I love the flip-around tablet. It's better than a touch screen for almost any creative application because of the great input resolution. The only real negative is that it's expensive.
Me, I carry a (non tablet) thinkpad x60s running Linux. it gets maybe 4 or 5 hours on the extended battery, and I carry one extended battery and two (half the charge) regular batteries. (I'm a big guy and the thinkpad x series is small, so the extra weight doesn't really bother me. It's still lighter than my girl's giant T series laptop w/ extended battery. That thing is heavy.) Also, the thing is cheap enough that I don't get too bothered at the idea of it getting destroyed.