i had try the Cintiq a few times whenever i was in a PC fair.

Imo, best to stick wif tablet board instead of tablet LCD.

When u wanna use the pen. It need like 0.1 to 0.2 sec to "switch" the detection to the screen. It a long run. U will feel irritating.
And u can't rest ur wrist on the screen. Later smudge the screen,rite?

If u got dat money, buy tablet PC. u can bring ur laptop to sketch at outdoor.

Ya.. u place ur pen on the LCD screen. u cannot directly start to draw.

It need 0.1 to 0.2 second to "switch power" to ur pen..

U can even using intuous 3 to draw on Zbrush ...hoho...