I am typing this on an x41 IBM tablet PC
You can find these on your local www.kijiji.com or www.kijiji.ca websites for about 200$ or less.
For that you get:
IBM build quality
Keyboard (short cut keys galore)
WACOM pen <--------------- yes you heard right
replaceable pens cost 80$ or much much less. (i'm getting 3 for 50$ from a specialty shop)
A slate tablet when you want.
You prevent a laptop from going to the dump.
here is something i painted yesterday: