I second that for the PDA GPS. I had originally looked at the Garmin PDA but in the end I went with:
Palm Zire 72 (they now have a silver one that the paint doesn't come off of, mine looks....
Delorme Blue Logger (Bluetooth) w/software
"Cupholder PDA holder, generic brand" (ebayed)
I've had this system since last November and it has been GREAT! I have carried it around outside the car for various "other" uses too. I doubt I could of topped this so I'm VERY happy! Previously I used a laptop with car/desk screwed into the floor. This is much more compact and is easily swapped from car to car. With a little work I could hide the wiring, but I'm more for function than form.
