Architects/Designers, what types of laptops do you use?

I need to know for future reference what types of laptops would be able to handle multiple programs that take up a lot of space ( CAD, 3ds Max, Photoshop, and more). I'm looking for something that has a battery life of at least two hours and last me 3-4 years at the least. I'm looking for something low price but still open to all suggestions. Thanks!