desktop........... the battery on a laptop would run down to quickly and i don't think you would be able get the performance to make it a viable alternative. If you want desktop specs I could tell you a great one and a graphics card isnt overly important the Quadro is specifically designed for design programs and 4gb of Ram would be good.
Matt
Edit: just went on the dell website and they want $1,500 just to upgrade the ram to 4gb