I got a Toshiba Tecra M4 at work and did not like it at all. It was nice and powerful, but I found it too big and bulky to use as a tablet, the fan was very noisy and on all the time, and the battery life was awful (1.5hrs)
Yeah, it is a bit bulky, but I haven't had any problems with the fan nor battery life (I'm getting at least 3 hours out of it, maybe you had a faulty battery?)
p.s. for most of the slates you can still get a docking station and connect a keyboard via USB ports.
Or just get a normal USB keyboard/mouse and plug those in