Are there compatability problems?
I was thinking of starting out slow, and then move onto the Happs' butttons or Joysticks.
I know what 80% of you guys are going to say: Why don't you build one for the amount of money you'll end up spending?
Why? Because switching over to Xbox, GameCube, Dreamcast, and PS2 will be so effortless that it'll be worth the money.
I lack time (job) and resources (tools), so I figure I'd buy an X-Arcade Solo and then mod it somewhere down the line with a different joystick and colored buttons.