I too had the Problem with the mouse (Gateway touchpad) going nuts on boot into WINXP. No GPS plugged in at boot and its all good...

As for the GPS, Bass pro shops have the best prices on Etrex units... and they have been having sales recently.

Etrex standards go for about $130 normally + $30 pc cable ($50 for one with cig adptr) but i got mine during a sale so I got the Etrex-V w/ waas for $180 total (pc cable included) The Waas makes a huge difference... it really does. I can get down to 5ft accuracy, but usually its 12-40. The non wass units is 50ft plus.