I don't think that it's worth spending the money unless you can actually use the wireless ability of the mouse and/or keyboard. I'm always sitting at my computer desk, so there's no sense for me to have one. I'd base it on that preference. I don't have any experience with wireless keyboards or mice, but I know that I personally would rather have a cord attached.
Here's the mouse that I've got -
http://www.razerzone.com/products/index.html the Razer Boomslang 2000, it's a KILLER mouse, It's mainly a gaming mouse, but it's also great for everyday use. Check out how precise that puppy is. It has 2000 dpi, which is up to 3 times as high as most other mice. It's great. It costs $99, but I think that it's definately worth it. Some people might say that it's still a ball mouse, but it's much more acurate than the infared mice.
Anyways, I know that I didn't help you with your answer, I just rambled on, but that's what I do best, he he he
Slick
[This message has been edited by Slick (edited 02-08-2001).]