Ive got my first tournament while playing tyranids coming up and wanted some advice on my list. Ive played a couple of games against people at my local store and it seems to do pretty well. Here it is:

Tyrant: 285pts Lash Whip & Bonesword, TL Devourer w/ Brainleech, Paroxysm, Leech Essence, Acid Blood, and Old Adversary, 1x Tyrant Guard
Prime: 110pts Deathspitter, Lash Whip & Bonesword, Adrenal Glands

3x Hive Guard: 150pts
2x Zoanthropes: 120pts
Doom of Malan'tai: 140pts Spore with Deathspitter

20x Hormagaunt Brood: Toxin Sacs 160pts
14x Termagant Brood: 70pts
Tervigon: 200pts Scything Talons, Stinger Salvo, Adrenal Glands, Toxin Sacs, Catalyst
7x Genestealers: 160pts +1 Broodloard w/ Scything Talons
3x Warriors: 145pts Rending Claws, Adrenal Glands, 2 Deathspitters, Venom Cannon

Tyrannofex: 265pts Rupture Cannon, Stinger Salvo, Dissector Larvae
Biovore: 45pts

Total Points:1850

This list has done fairly well for me in the past few weeks. The one thing I switched in it was old adversary for hive commander on the tyrant. My last game tonight was the only one that I was in a little trouble in. It was a 5 objective match against CSM that ended in a draw.
Things that I know people play in my store are:
CSM heavy on obliteraters and demon princes
SW with long fangs and some type of cavalry wolves
Eldar with lots of Dcannons

Thanks for the advice.