If you're fine with a wired mouse, you can get the Logitech G9x (CoD MW3 Edition) on Amazon for only $41 (instead of $99).
I don't play CoD, but I got the G9x MW3 because of the discount!
I'm using the smooth wide-load cover and the mouse is unbelievably comfortable... There's also the anti-sweat claw-grip cover (which I don't use that often because I'm a palm-grip type.
The adjustable weights are also a plus... Just make sure to fully
insert then into the weight drawer or else it will get stick inside the mouse. It happened to me the day I got it, but luckily I gave it a light whack and then the drawer came out...