basically any of the sport yamahas would be excellent screw around 4wheelers
if you want to do alot of wheelies i would suggest a blaster they aren't the fastest but are light and accelerate quickly making them good for wheelies[:-]
my friend has a 350 twin banshee and if you ever need to rip up your lawn this is what you need it is awesome with burnouts and donuts it has a six speed manual on it and is fast we were racin against a mustang the one day and i out accellerates it for a little while
but the ultimate would be a raptor these are by far the best and fastest 4wheelers produced by yamaha or anybody[8D]
but i you will just have to look around for one in your price range as long as it is a banshee or raptor it will scoot but just a fair warning do not take these 4 wheelers off into the woods where there are mud pits or logs because they get stuck easily compared to utility 4wheelers[X(]