Can someone recommend a good laptop for Intuos Pro + Photoshop + Corel Painter?

Basically I am loving my tablet so far, and I want to be able to take it with me wherever I go. So I'm looking to buy a laptop. The two programs I use the most (Photoshop and Painter) claim to have very low system requirements, but that doesn't necessarily mean they will run smoothly on any computer.

I'm mainly worried about two things: 1.) Painter is a newer program and even on my (pretty powerful) desktop it occasionally slows down or goes weird, and 2.) reasonably priced laptops probably wouldn't have a very good video card in them.

So I know for a fact that lots of other people use laptops with their Wacom Intuous tablets, but I'm curious what the best choices are? Any ideas?