Update! Excellent News!

Well Ladies & Gentlemen,
good news: I will soon have all the models I need for my army (bought. Not built/painted)

I just found a video about someone's Tervigon - he used a Malanthrope body and head and a carnifex lower body and legs - perfect if you ask me. Looks brilliant. I might exchange the head with the Carnifex's one though.
So as soon as I can I will order the Malanthropes and get the last few Termagants. The only thing missing is the spore, but I guess I'll just get one of those dragon toys like seemingly  everyone else does.
I also decided on a colour scheme: White undercoat, Adeptus Battlegrey foundation, black shadowing, red "insides", silver horns/teeth and metallic green (1:1 dark angels green and boltgun metal) carapace. Anything tube-like will blue. I will post the first painted models as soon as they're done.

In case you haven't seen the list. While I might give it some small tweaks and changes in weapons, nothing much should change until I played a good few games with it.

HQ: Tyranid Prime
-Lash Whip & Bonesword
-Deathspitter (or Adrenal Glands)
-Toxin Sacs
-Regeneration

HQ: Tyranid Prime
-Lash Whip & Bonesword
-Deathspitter (or Adrenal Glands)
-Toxin Sacs
-Regeneration

Elite: 3 Venomthropes

Elite: Deathleaper

Elite: 3 Zoanthropes
-Mycetic Spore
-Twin linked Deathspitter

Troops: 15 Termagants
-Devourers
-Mycetic Spore
-Twin linked Deathspitter

Troops: 13 Termagants

Troops: Tervigon
-Toxin Sacs
-Catalyst

Troops: Tervigon
-Adrenal Glands
-Catalyst

Troops: 11 Genestealers
-Toxin Sacs

Heavy Support: Carnifex
-Frag Spines
-Adrenal Glands
-Regeneration

Heavy Support: Carnifex
-Frag Spines
-Adrenal Glands
-Regeneration

Update

Sorry for not posting in a while. College was busy and I was taking a break from Tyranids.
At the moment I am just finishing my 1000 points Space marines-after that it really depends on how much money I have: I either finish my Tyranids or go for Grey Knights, since I really really like them.

Anyway- after my Space Marines are done I will build and paint 3 Zoanthropes and continue on A TERVIGON! After that, and the Tyranid Prime, it's only about painting them. 2000 points are ready to go:

HQ: Tyranid Prime with Toxin Sacs, Bonesword/Lash whip, Regeneration
HQ: Tyranid Prime with Deathspitter, Toxin Sacs and Bonesword/Lash whip

Troops: 18 Termagants with Devourers
Troops: Tervigon with Catalyst
Troops: 8 Genestealers with Toxin Sacs
Troops: 8 Genestealers with Toxin Sacs
Elite: 3 Zoanthropes
Elite: 3 Venomthropes
Elite: Deathleaper
Heavy Support: Carnifex with Bioplasma, Frag Spines, Regeneration and Adrenal Glands
Heavy Support. Trygon Prime
? Fast Attack: 6 Spore Mines
? Fast Attack: 6 Spore Mines
? Fast Attack: 6 Spore Mines
? Troops: 4 Warriors (2xscything Talons)

New army list

Okay so after long considerations I changed my army list to a CC-genestealer army. Ninja-ish.
And guess what? I am only missing a box of genestealers to have the 1750 point army complete! And

HQ: Hive Tyrant with Lash Whip & Bonesword, Devourers, Old Adversary, maybe Hive Commander, Armored Shell and Regeneration.
Troops: 8-9 Genestealers with Toxin Sacs
Troops: 8-9 Genestealers with Toxin Sacs
Troops: 9 Genestealers with/without a Broodlord (all with Toxin Sacs)
Troops: 9 Ripper Swarms with Tunnel Swarm, Toxin Sacs and Spinefists
Elite: 3 Venomthropes
Elite: 3 Lictors
Elite: 6 Ymgarl Genestealers
Heavy Support: Trygon Prime with Regeneration
I might upgrade the Army by putting in ~250 points worth of Warrior with Lash Whips, Boneswords, Scything Talons and Toxin Sacs and have them outflank. 

I also started a Space Marine Mech-Army (many many conversions, as always): http://kriegmech.blogspot.com/

A few notes on Army Design...

Okay so since I am not going to play on tournaments (for now), I want to do a fun-army. BUT I still want to use the full potential of Tyranids.
So two things that I want are:
1) Shrikes with Boneswords and Toxinsacs (wound on 4+, if wounded take a LD-test on 3D6, if fail-> instant death)

2) Hive Tyrant with a Bonesword & Lash Whip and Acid Blood (for every unsaved wound caused on the Tyrant, the attacking unit must take an initiative test-especially with small units, which are all in base contact with the Tyrant this means failing the test on 2+, for big units they can use their normal Initiative, but still 2D6 with an average initiative of lets say 6 is still pretty hard. Anyway-they have to take Leadership test and if they fail-> instant death).
I'd also like to have a Tervigon to give the Tyrant Catalyst so it survives this whole thing. I also want the Tyrant to have "Hive Commander" so the Tervigon can outflank (as long as I take at least 10 Termagants). Old Adversary would also be pretty neat, especcially if the Shrikes would be close to the Tyrant. Since the whole army deepstrikes/outflanks the Tyrant would need wings as well-all this makes him pretty expensive though and even though he is not worth it, i will play him.

3) I will take a Deathleaper, a Doom of Malantai and 2 Lictors as Elites (I know-Zoanthropes and/or Hive Guards are a Must-Have for "good" armies, but I am only playing fun games. I need the lictors/deathleaper keep my deep-striking units from scattering...)

4) I will take a Trygon Prime and Gargoyles since they are pretty good value.

5) I would love to take a few units of 4 Genestealers + 1 Broodlord to get big effects off leadership tests (aura of despair), but this all just gets too expensive.

6) at first I didnt want to go with the Tyrant, but have a Parasite of Mortrex instead, which would be in a unit with the Shrikes to make it difficult for the opponent to either have more Ripper swarms to fight or face more possibly-instant-death-wounds. I might strip some units and still play the Parasite, since I really like it.

Trygon Prime Cont.

Okay so here is my brand new Trygon Prime. Its not all done yet-gotta make it look more slimy and also have to do some base-decoration.

Venomthrope

Okay I had my Venomthrope done since some time already but didn't make any pics of it. Here you go =)

Trygon Prime

Okay so I just started with my Trygon Prime yesterday-it should be done on monday (I am just at painting it right now).
I also started a Pyrovore (yes, I WILL play them), have to paint that one as well. Tomorrow the first Shrike should be ready to be painted.
I have to order some wings for my Parasite of Mortrex.
I will also build a Mawloc soon, but I wont play it (just don't really like it to be honest)-will look deadly tho!
Pics will come soon!