Wait till after CES and Macworld. You may see better options. Apple may have a new device and CES may have some interesting MID's

The 800 is cheaper but cheaper is not better. I can't bring myself to go with a larger cheap plastic humpback body and a ridiculous popout clit camera that doesn't work. The 810 GPS works OK and if you want better you can still get an externally mounted car bluetooth gps module and just connect to that in your car.

Pocketability is cool but so far I'm thinking of just getting a good 12 or 13 inch laptop for portability now and waiting for the next generation of pocketables in the Fall.