With the xbox 360 x-plorer controller, all you need is the controller and 1 free driver. At least thats what I had to do on the mac.

Guitar- because with keyboard you can easily press like F7 instead of F6. Which is annoying. Plus i hit the escape button sometimes on the keyboard. Plus guitar makes you look less like a crazy person.

I just ordered an Xbox 360 X-Plorer! Should be fun.