http://www.razerzone.com/
When I was big into Counter Strike gaming and the whole Steam/Valve things I bought LOTS of stuff from razer things like, mouse pads, mouse, headsets, keyboards the whole thing needed to be "pro". I now use their modded controller for my GB/MLG 360, MW2/Black Ops gaming. The controller is formed to fit your hand comfortably, rubber gripping, The D-pad/Arrows are separate, 3 buttons on the Left & Right side ,and a feature on the Tournament Edition I really like is the addition of raised analog sticks AND the option to loosen/tighten them. The controller can be used on both PC and 360, I have also plugged it into a PS3 and gotten the same use out of it.
I just bought a new laptop and have been ordering a extra mouse, mousepad and other accessories and figured you guys would like a good site to buy from.
Just to let you ALL know, NO I am not being paid or told to do this by ANYONE from Team Razer or anyone connected to them.