You need a side view to be able to tell. I got a concave one at work with my last upgrade. After 30 minutes I went and dug my old one out of the trash barell at the IT dept.
I'm dying to go wireless on my mouse but the one I bought and returned (an HP) was so heavy from the 2 NiMH batteries that it was starting to cause carpal tunnel symptoms. Pushing it around the desk took too much force compared to my wired one. It didn't help that it had cheap plastic pads instead of nylon/teflon.
I bought a cheap Keyboard/ Mouse combo (wireless). Its a labtec, the entire thing cost me 40 dollars and its still working today 2 years after i got it. The only unfortunate things is that every 2 months or so it requires new batters... 2 AAA for the keyboard and 2AA for the mouse... But its not heavy at all!
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS