I have evaluated the NavOne 3000, and while it is on the big side, it is very nice! Completely plug-n-play, all pre-loaded, and they say they will have flash upgrades for maps soon! I thoroughly enjoyed it, and if you find TWO, venom1, let ME know as well!
I also tried out the Garmin M5....more of a PDA with GPS. Nice little unit, came with all the map software that you would download to a SD card. Cool thing is you could download and little, or as much, as you wanted (depending on the size of the SD card). Had a car docking station with DC adapter and speaker.
Good luck finding more of the NavOne 3000....at least ONE for AB!!