Man, I've been using the same mouse for 10 years now.Anyway, I recommend you get a Logitech mouse. In my experience they make the most reliable mouses.I'll see if I can find a nice new mouse for you.
Thanks, I found a logitech mouse that looks nice, but some reviews say that the scroll is way too sensetive.
Try to avoid wireless mice if you can. You'll run into problems such as batteries running out, increased input response time and signal interference. Wired mice are generally more reliable and responsive. They are also a bit cheaper.
http://www.logitech.com/en-roeu/color-collection/devices/wireless-mouse-M325What about this?18 months of battery sounds nice.
http://www.logitech.com/en-us/mice-pointers/mice/devices/wireless-gaming-mouse-g700