I've needed a replacement mouse for quite some time -- my current 'rechargeable' Logitech wireless mouse chews through a set of AA batteries about once every 7 days. It's battery life was never too flash, but at some point it seemed to lose the ability to charge the rechargeables, at which point it started to become a bit expensive to maintain. I bought a Wireless IntelliMouse 2.0 as an attempted replacement, only to find that it conflicts with the Logitech keyboard, and the two can't be used in tandem (no option to change frequencies on either device). So The Logitech MX 518 looks like a suitable replacement, even though it has a cord - I mean just listen to all this crap which they write about it:
If you´re going to play at the highest level, you need a mouse that gives you an edge. The Logitech® MX™ 518 Gaming-Grade™ Optical Mouse does exactly that with its ultra-high resolution, 1600-dpi MX™ Optical Engine that delivers lightning-fast response and mirror-smooth tracking.
The MX™ 518´s advantages don´t stop there. You get instant, in-game sensitivity adjustment that lets you switch effortlessly from pixel-precise targeting to fast-twitch acceleration, without any software. And the contoured grip ensures peak performance and comfort, even during the most intense gaming sessions.
Wow, it's "gaming grade" - whatever that means. Possibly that it's built to survive being thrown across the room in frustration regularly.