This is also my current quest. I have the same criteria and the sharp netwalker would be perfect if only it could be folded to make a tablet.

My only addition is that a 5" screen is preferable

Not my intention to hijack only to attract more attention.

It should be noted that I already have an n810 and love it dearly but I find I also need a device to do word processing out and about on but I dont really want to bring a netbook everywhere I go, unlike the tablet which virtually lives at my side.