Get the FPS thing out of your head. FPS means jack shit for an airsoft gun. What matters is the quality of the components and quality of the build, and the quality and weight of the ammo. FPS is also so easy to change that it really should be far down on your list when selecting a gun.
Ask Crunchmeister.. his Real Sword Type 56 shoots ar like 330, and he constantly comments on how it's the best shooting, longest ranged gun in his collection.
Yea, for outdoor play you'll probably want something shooting at least 330 so you can fire 0.25g BB's.. but that's not necessarily true. My MP5 shoots at 275 at works great. I just need to get a bit closer to use it effectively.
"Someone in a Prius tried to race me at a stop sign the other day. I couldn't believe it. I had him for the first 100 feet or so but I can only walk so fast."