After my recent experiment with the Samsung Q1 UMPC, I pretty much ruled out 7" and am now deciding between HP TC1100 (10.1") and Motion Computing's M1400 (12.1")--although I have a feeling that 12.1" may be too big. Newer versions exist in both cases, but I wanted to start with a used unit first. You can get either one used for $300-$350.