Hi mictu,

you can also look for :HP Pavilion tx2130el Notebook PC
wich has wacom technology(it's pressure sensitive, i guess 512 levels)
The only drawback is windows vista

or Cintiq 12WX 999$
pressure levels 1024 and tilt range of the pen +- 60°

link:
http://www.wacom.com/cintiq/12WX_tech_specs.cfm