@bdix
Still on the fence with nids, personally. I need to mull over some lists and read some message boards on how they are panning out. Jury still seems to be out on if they can pull themselves out of the codex basement and rumble with the big boys (IG, Crons, DE, GK).
I'm afraid not being able to take allies will prove a serious hindrance. All other codexes can compensate for what they lack by taking an ally to fill it. However, I do like the ability to have flyrants, lots of psykers, glancekill vehicles, and be able to bubble wrap/tarpit.