I use a PS2 controller with a USB converter from Radio Shack. I've used the Sidewinder which is okay, except I don't like the D-pad. It's kind of difficult to pull of some moves on fighters. I wish I'd known sooner that I could just buy a $10 PS/PS2 (now $5 when I bought another one!!) converter. Some of the places I went to like Circuit City, had really funky and crappy controllers, I mean there were rows and rows of them. By far the sidewinder was the best of the bunch, but just crap to use for me. Whether it's the PS or GC controller you like, you can find USB converters for pretty much any system. IMO the PS controller is the best.