Deathadder! It's just a great gaming mouse if your budget is in that area.
I'm using a Logitech G11 and it's great, no issues really except the key press is a little harder than my previous keyboard, but that's a personal preference kind of thing. Can't fault it, and they're pretty cheap now. Loads of extra buttons to assign to pretty much anything you want too, and media buttons. Actually, there is one naff thing about it, and that's the unpowered USB 1.1 hub. Needs to be USB2.0 at least, and power more than a weeny flash drive, but the newer ones sort this I think. I barely use the hub on it though.