Comment First decide on your screen size (Score 1) 356
I used a number of devices with different sizes. The 2.3" mini Android phone up to a 10.1" tablet. My current favorite form factor is 7". It fits into a cargo pocket or a (inner) pocket of a jacket (even a suit, but I guess that's not your concern). I currently use a Huawei MediaPad. Solid unibody, great screen resolution. Runs Android 3.2 (unfortunately they haven't announced when they will upgrade to 4.0). Huawei leaves the UI in its original state, so you get pure Android bliss. Biggest let-down: you have a separate charger, it won't charge through USB, so you need to carry an adapter. It is slimmer than the Samsung 7"