I'd vote Razer Diamondback 3G for the mouse, I always take crap for recommending it, but its hands down my all-time favorite gaming mouse. I've got three of them - they all still work perfectly too. Perfect shape, perfect level of sensitivity, perfect weight/feel.
Yes, I'm a bit biased, but I have used other, newer razer's and I did go with a logitech g9x for part of last year. Long story short, I sold the g9x and went back to the diamondback 3g, just a better mouse all around imo and I game much better with it.
Honestly, go to a LAN party/friends house/etc and ask to try out some gaming mice. The one that feels right in your hand is the one to go with, don't worry about how expensive or how many DPI it has. If a $30 cheap-plastic mouse feels good in your hand and makes you play better - go with it.
Originally Posted by KarmaKiller
Honestly one of the reason I like that razer keyboard is because the media player keys (which are few and far between on mech boards) and also the back lighting is extremely nice to have at night.
^AGREED. Media player buttons are never important until you don't have em' - especially if you listen while in-game.