ZBrushCentral

What laptop should I get?

Hi everyone! I am looking at getting a laptop to be a little more mobile with my 3d work, and frankly I have no idea what to get. Does anyone have any recommendations?

I figure I will probably need 4 gb of RAM, but other than that, no clue what brand/model/specs to look for. I dont want to spend 4k on the thing, but I do want something good, at an affordable price.

I will be running zbrush on it as well as Max/Maya and Photoshop (zbrush i can deal with running alone, but I will be running Max and Photoshop at the same time for the most part).

Any help is greatly appreciated!