SL-Cxx00 is the best form factor, without any doubt. Bigger keys, a landscape screen, plus I don't like the double cover on the bottom, at least on the c860, it looks like an afterthought addition. If Sharp will ever release a new Zaurus, I hope they'll keep this form factor, maybe with a secondary screen on the back of the cover instead of the swivel, which I must say I never use.
Speaking of the Cxx0's graphics chip, how does it compare with the Cxx00's one?
Varti