I like logitech.
mx510 mouse, elite keyboard, & z-640 5.1 speakers too (meh, but they only cost me $30 new). Might give the speakers to my bro and get a good pair of 2.1s though. I have the rears hooked up, but they sit under my desk because I don't want wires running along the floor next to me and because I don't really do anything on my PC that makes use of 5.1.
If I have to use a split keyboard though, I prefer the microsoft ones over the logitech.