Actually, I'd go for an 860.
Reasons behind this:
- size
- clamshell factor, but I can keep it 'inside out' like a real PDA
Although, if Sharp brought me a SL5500 sized unit with 256 MB of RAM, 64 MB of flash, and 640x480 as well as sound, I'd be a taker, given I can install OZ on it. I don't want wlan in it, and neither do I want a freakin HD, else I'll just use an OQO so I can have Linux, but from what I've seen so far, the OQO seems to suck profusely as it's not a clamshell, but a 'slider'.