There's a lot of things worth considering when you talk about mice. Now, personally I play a lot of different types of games, so having only one style of a mouse can be rather limiting. At the time when my other mouse was really giving out and giving my a splitting headache, I ended up picking up a
Razer Naga Hex V2 and needless to say, with everything electronic, something new and better came out just a month later
Razer Naga Trinity. Now I've had my Hex V2 coming up on just about half a year, and the only real complaint I could really have for this mouse is the fact that over long gaming sessions, you might have difficulties keeping your thumb on the pad where you would keep your thumb on because it picks up on the moisture from your thumb and can seem slippery at times. Unfortunately if I was able to though, I would of gotten the Naga Trinity, just because it's the best of all three worlds in one attempt which you can change freely. If you're looking for something wireless though, it's gonna increase the overall price for most products though.
I wish you the best of luck with whatever you choose!