I'll be happy to help, but what are you looking for? For instance, are you looking into a mouse with many buttons, a claw-type mouse in which you bend your fingers to grasp the mouse, a palm-type mouse in which you relax your palm on top of the mouse, a wireless or wired mouse, an ambidextrous mouse, right-handed mouse, etc? There are many types of mice and "gaming" doesn't matter as much because if the mouse suits you, you play better and thus your gaming experience is better.
However, if you want high DPI, fast response rate, you may want to get a wired mouse rather than a wireless mouse. The good thing about "gaming" mice is that their wired mice can come with weights. Why weights? Because it goes back to the feel of the mouse again, if it feels better, it works better for you. That and if you're used to wireless mice--which has weights because of batteries--you may prefer a heavier mouse.
There is one mouse that has caught my eye because it's very... customizable taking into account everything I've mentioned to you. The Cyborg RAT can change to fit your needs--with limitations, it isn't a real Transformer: http://cyborggaming.com/prod/rat9.htm I've never used it myself, but I've never been able to get myself to spend that much for a mouse.
In my personal use, I've used many Logitech mice from the cheaper M305s, to the tried and true bang for your bucks M510s (a lot of people like the M518s), to their more expensive MX Revolution, VX Revolution (and Nano), and finally their gaming series G9s. As much as I love the G9, i feel that the M518 fits me better.