RE: What do I want???? :)
From all the research I did before I bought my Heli, It all depends on what you wanna do and budget. I came from flying 3 ch. micro helis as well and even though I got a 400 size collective pitch heli as a gift. I haven't flewn it yet. I orderen an Exceed Falcon 40 V2 Fixed Pitch heli as my maiden flight. I flewn my friends coax a few times and single rotor helis are a totally a different beast on its own. If your planning on going big in the future (like a 450 and up). I'd recommend a fixed pitch heli, and if you want to fly outside, the bigger it is.....the more stable it will be.
hope that helps