So, you are sitting there staring at newegg. You are trying to decide if you can go with the cheap mouse/keyboard/router/hub/ect.. or spend the couple of dollars extra to get the good one.
Spring for the good one. Getting high quality equipment from reputable companies always pays off, both in the longevity of the product, the reliability of the support, and the enjoyment you get from using it.
I have a few companies that I know I can always trust:
Samsung
LG
Logitech
Buffalo
Creative
OCZ
Brother
Fellows
Their products are always slightly more expensive, but always worth it.
On that note, I am getting another Logitech mouse, my last one was a cheap refub and has lasted me for quite a while. It still works, but I need something a bit more fully featured for my desktop, so this one will be getting laptop duty.