I try to stay away from them for one reason alone, batteries. I have also been happy with microsoft mice, but that does apear to be a pretty good deal on a wireless optical mouse, and I'm sure it will make a nice addition to your system.
oh yeah: you might want to check out best buy before buying a mouse online, I found an intelli mouse explorer 3.0 mislabled and got it for $15 it's not wirless but it's usb and optical and I love it.