I've been using a Roccat Kova for over a year now and it's still working and feels as though I've just got it out the box.
I've used a number of Razer and Logitech mice before I bought this one but I'm happy to say that this is the best one I have used.
It's comfortable, it glides and it's a decent size. Not to mention it's pretty cheap and I haven't had one problem with it since purchase, which I can't say about any of the razer / logitech that I have had previously.
http://www.roccat.org/Products/Gaming-Mice/ROCCAT-Kova/
After looking at the roccat website it appears there's now a Kova[+]; so that might be worth a look at too.
edit after looking at the video for the kova[+] IT TALKS TO YOU!? what else would a geek want?
