Not too sure about the mouse, but I see no reason to update... I use a cheaper wireless Memorex as my main mouse and it's pretty good. If you keep a spare set of rechargable batteries charged and ready, it's not bad having a mouse like this. But all in all, the best mouse I have is this cheap Micro Innovations(wired) Seems to have the best lasor, most precise, etc...
Hehe, probably kinda OT, sorry, just getting a bit of input ^^;