Good topic.
I have the Razer Deathadder 2013. It has a configuration program that lets adjust your dpi, acceleration and polling rate. Not sure what polling rate is but I have two different profiles right now for my mouse. One of them is at 800 and I use that one the majority of the time. The other one is set at 3400 and I use that when I just want to flick my wrist around instead of dragging the damn mouse across my pad.
It takes a while to get used to the difference though. Like Jabber said, it gets pretty retarded to go higher. This mouse goes all the way to like 6000 and it's furking ridiculous. Nobody will ever be able to use that.
Anyway, I wanted to mention the Mark C mouse acceleration fix. Basically you download it and it gets rid of all the mouse acceleration built into windows. It's freaking great. It allows you 1:1 input.
Download here:
http://donewmouseaccel.blogspot.com/2010/03/markc-windows-7-mouse-acceleration-fix.html