I picked up my new Tablet PC today. This Lenova X220 replaces my HP2107p. So far the form factor win goes to the HP2107p. I am starting to set up the Lonova X220 and ergonomically I really dislike it. Why would you design a Tablet that is awkward to hold. I do like the touch screen, but little else on first impression.
The dock is ridiculous. Compared to the thin dock of the HP2710 the Lenova X220 dock raises the keyboard up over an inch. Getting used to typing at this height and angle will take some adjustment. If the DVD weren't in the dock, the dock would be in a drawer.
Overall the X220 has to edge out the 2710p, but perhaps only because it is 4 years newer.