Actually dabbing in this myself; so far I have used the Razer Mamba, Razer Lachesis, Razer Deathadder, Razer Orochi, Logitech MX Performance, Logitech Marathon mouse M705, Apple Magic Mouse, and Magic Track pad. These are my thoughts, and where I am going to head next.
Now as far as gaming, the M705, MX performance, Magic Mouse, Magic Track Pad, and the Orochi all have subpar wireless performance for gaming, and none of them work at all for this for their different reasons. I will only cover the wireless ones right now though.
THE BAD AND WHY:
Razer Orochi:
The DPI on the Orochi was actually not AS bad (2000dpi), and I found it was "accurate enough", however the killer of this mouse and why I returned it was that after not moving for a second, it would go to sleep, and would take a split second to wake back up, and would jump to a random position. This is NOT good when gaming, and was unacceptable. Wired performance was good, but I don't like wired mice anymore. Keyboards, sure, but not mice. Other than that, it actually was a good mouse, but that was just too big of an issue for gaming! You can obviously custom program keys to do anything, which is nice, but what sucked about this is that I had to do this just to get "back", "forward", and multi-tasking things in OSX to work right, as none of this did out of the box. Plus, while the rear buttons on the side were easily depressed, the front buttons were near impossible to press without some trouble as they sat almost recessed in the mouse. Good idea with this mouse, just bad design on the buttons, and with the wireless mode.
Logitech MX Performance/M705
I group these together, because oddly enough they seem to use the same sensor, and have the same DPI in wireless mode. Returned both of these due to only having 1000dpi, which for gaming, especially on a 27" iMac, tends to be way too low and you just can not seem to get the mouse to an exact point quickly enough. I did enjoy the Logitech software, which works great with OSX right out of the box with mapping the keys to be useful without having to tweak it like Razer. Buttons are easily pressed, and the trackwheel is awesome, I really loved these mice, but the horrible wireless performance with low DPI killed these off for me.
THE GOOD:
Razer Mamba
This mouse was amazing. Accurate, fast, comfortable; sure there was the problem of initially setting up the software like the Orochi, but it was such a pleasure to game with, that I can easily recommend it. Battery life may be poor, however with the docking station, charging it is never a problem. This though, in lies the reason why I returned it: the dock. You see my computer is in my room, and while you can turn off the light on the mouse, you can not seem to disable the light on the dock, so you can imagine how annoyed I was with this light glowing at night telling me my mouse was charging. Skip past that though, and this easily was my favorite mouse by far.
As of right now, I am currently not gaming, and am using the Apple bluetooth keyboard, with the Magic trackpad (returned the Magic mouse). The Trackpad is a joy to use for every day computing as I find it to be more accurate, and fun to use than the mouse. Right now I am waiting for Guild Wars 2 to come out, and will again start to game, and plan to give the Logitech G700 a try. Good DPI like the Mamba, no dock to fiddle with on my small desk and keep me up at night, and great ergonomics. If that doesn't shape up, then I will just get the Mamba again, but somehow I think I am going to really enjoy the G700 as I have all my previous Logitech mice. Also plan on getting a nice mechanical keyboard as well, but that is an entirely different story.
