I am in need of a new work mouse. I like Microsoft Wireless Mouse 4000 that I use at home, but the rubber gets too soft too quickly. A new mouse would be nice if it were sculpted and be fairly sizable. I've been using M505 and I find it too small. Wired is fine. MS and Logitech are fine, but I've had tons of bad luck with Logitech input devices so far... (the current one, M505, interprets all clicks as double clicks, which is apparently a common problem for the mouse)

Any suggestions?