If your field requires that you have something with strong graphics processing ability, then you'll probably be forced into looking at gaming notebooks and workstations. Laptops have come a long way over the years, so the 'portable' workstations out there are sometimes referred to as desktop replacements as well.
If you have some general specifics of what you think you'll need (or what you will need the laptop to be capable of running), feel free to shoot that info this way so that I can recommend specific laptop models and hardware.