For me this would be the easiest choice in the world.
Razor Diamondback all the way (either the Chameleon or the Magma)
There has been a review of this mouse on tomshardware
With the right XP mouse acceleration fixes and Hz fixes the razer back is by far the best gaming mouse out there in my personal oppinion.
And best of all you can get it quite cheap on some online shops if you look around.