What kind of grip are you looking for? Do you like your mice big or do you hold them with your finger tips?
This is the one I use. It's pretty good, has a DPI switch for quickly switching speeds (fast for general shooting, slow for sniping). Only issue with it is that my hands are kinda big for it and I don't really like holding mice with my fingers instead of using my palm. http://www.newegg.com/Product/Product.aspx?Item=N82E16826570014
For me it has to be the Steelseries Sensei Raw. I have had 2 (Sold my first one when i sold my pc then bought another because i loved it so much for my laptop)
They are brilliant and fairly cheap too.
Not much to say about it really as its mostly a basic mouse (Selectable DPI and 2 buttons on the side). But they are really comfortable and good for large hands.
If you have smaller hands maybe look at the Kinzu. I loved mine when i had one almost as much as my sensei was just a bit small.