If you are looking for an inexpensive set of decent computer speakers.. everyone seems to like Logitech... My Infinity Primus speakers and subwoofer, at the time I bought set me back more.. but now can be bought for around $1,500... its all up to you..
do you want to piss off ever one in your dorm wiht really loud music? OR do you want theater quality? just general quality? avoid 5.1 and get 2.0 5 watt speakers for $15