I use to use a Razer Sidewinder (one of those models) but due to hand cramps had to give it up. I'm a fairly big guy (6'3") and my hands where to big for it.
I ended up getting the Microsoft Sidewinder mouse, which I've been pretty happy with. Its the biggest gaming mouse I could find. It has upto 2000 dpi, 2 thumb buttons, switch profiles/dpi on the fly, adjustable weights etc. It says 9, but really the L/R and clickable wheel, + 2 thumb.http://www.newegg.com/Product/Product.aspx?Item=N82E16826105074