I've also got a wireless keyboard; it works just fine and I don't notice any difference. The lack of wires is nice.
I've got a Logitech Comfort Duo. Batteries on the mouse seem to need replacing every week or two and the Keyboard every month maybe. I keep rechargables onhand. At least the Logitech software will tell you when the batteries need changing. I think I got my set for around $60. I think a big difference in the cheap and expensive is range/technology for transmitting. Make sure you look into that. I think RF is pretty good and IR crappy, but look into the details. I wanted an ergonomic keyboard (I was spending a lot of time at the keyboard and I needed a new mouse anyway, so I only had 2 options (Logitech and MS) that I could find. Speaking of which, I think ergonomic keyboards are really cool too.
Mary has a really neato wireless mouse that you can move through the air (no surface required). The brand is Gyration.
Wireless
I've got a Logitech Comfort Duo. Batteries on the mouse seem to need replacing every week or two and the Keyboard every month maybe. I keep rechargables onhand. At least the Logitech software will tell you when the batteries need changing. I think I got my set for around $60. I think a big difference in the cheap and expensive is range/technology for transmitting. Make sure you look into that. I think RF is pretty good and IR crappy, but look into the details. I wanted an ergonomic keyboard (I was spending a lot of time at the keyboard and I needed a new mouse anyway, so I only had 2 options (Logitech and MS) that I could find. Speaking of which, I think ergonomic keyboards are really cool too.
Mary has a really neato wireless mouse that you can move through the air (no surface required). The brand is Gyration.