Looks like you have a fairly decent desktop for gaming. As a college student myself, you probably don't need/want to be gaming in lab, class, or in the library. IE no real need for a portable gaming machine.
Maybe it depends on your school and major, but you might be needing to carry around your laptop a lot to take with you to lab, go to a partner's house for project, or do some research in the library. If this is the case, you'd want a light laptop.
Oh, and before you actually buy a laptop, go to a store and try them out. Weight, screen quality/brightness, build quality, etc.