I just use a standard Dell optical lazer mouse. Never fails.
I compared it once to my freind's G7 and saw almost no difference. The only thing I noticed that was different about it was that it had more buttons, but they made no difference to my gaming experience (tested both mouse on HL2, FEAR, and Doom 3).
That's only my opinion however, and I can't stop you from wasting that much money on a mouse, but if you really want to nkow what I think, just go with any standard lazer optical mouse. Cord or no cord, it never bothers me, and usually the wireless mouse are more expensive.
Also, if you go with my suggestion (doubtful), make sure that it says something about "Lazer", because you may get ripped off and buy a "Optical hybrid" which uses a ball and is very inneficcient. I really hate those, they require lots of cleaning, and never work right, and have alot of resistance compared to lazer.
You read my entire post, then read my sig? What tremendous effort! You win an internet!
Here\'s a quote I saw once on a /b/ forum a while back, I think it\'s funny:
I\'ve been thinking of \"Heck\" lately. If it even exists, it\'s got to be a much nicer place than \"Heaven\". I mean... all the gay men are down there. You KNOW it\'s well decorated.
Note that I do not in any way condone homophobia or am in any way homophobic. I merely thought that it was clever.