I've been thinking about Nids more and more since 6th was released. They got the biggest boost of all 3 of my armies and have become really fun to play again. Plus, you guys don't stop by as much when I start talking about GK and DE. DaBoyz have removed comp scoring from their GT this year due to the fact that 6th ed will be a few months old and nobody knows what will be "broken" and need comping. As such, it's also really tempting to take Nids to that event and really bring my "A" game to try and get the forsaken codex in the top of the pack. I'd really like to take the DE I've been working on, but my 6th ed lists with them have required a considerable investment to add Eldar allies and flyers.
Anyways, here's a draft of an 1850pt list I've been considering for the GT.
Tyrant Guard x1
Hive Tyrant + wings, devourers x2, OA
Hive Guard x3
Ymgarl Genestealers x8
Tervigon + claws, toxins, catalyst
Gargoyles x30 + toxins
Carnifex + devourers x2, mycetic spore
Aegis Defense Line + quad gun
So it has decent anti-flyer with the quad gun, flyrant, and dakkafex. In theory, the flyrant and swarmlord can double buff the gargoyles or ymgarls with furious charge and preferred enemy to make them extremely hard hitting. All the deployed units are fairly resilient and shouldn't give up first blood too easily. The lone tyrant guard is the exception. He's alone with the swarmlord so if he gets Iron Arm, the unit's majority toughness goes up to 7-9. The icing on the cake is that I can pull this of with just 1 more box of gargoyles.
Anyways, let me know what you think. I may get to test it next month if they bump the point level up to 1850.