Im a semi-audiophile, and for college I would recommend a good set of headphones. They will give nearly as good sound quality, you can basically "shut off" the most of the time noisy dorm rooms, they are portable for the most part depending on what you get, which comes in handy at summer break when you have to clean everything out and you can use them anywhere library, on the way to class, etc.
If you get a set of in ear monitors you can really shut the world off, they are like wearing a pair of earplugs that music comes out of. Some of the downsides are a lack of soundstage, or depth of the music because of they way they sit inside your ear canal, and you get what you pay for. Decent ones start at about 100.00.
Check out
www.head-fi.com if you are interested in headphones. There is more information there than you can shake a stick at. Just read 1st and ask good questions with detailed descriptions of what you are seeking and people will be very willing to help you pick the right phones. - Just a warning, you might not get a good answer if you say " Help, I need phones, recommend me some" without stating musical tastes and a few phones you have narrowed your selection down to.
Good luck,
Billyp