I guess I am the Dell outlet advocate here. I've bought two desktops and two laptops without any problem from there even though they were listed as refurbish, they were brand new as far as I could tell. It will definitely save the parents some cash. I really wouldn't worry about it getting stolen from the dorm because dorms are small so any party would be limited to close friends and if you have to worry about your friends taking your stuff you need to look for new ones. Just lock your door up and you are good.
Apple is nice, I owned a Macbook but I didn't care much for OS X. I guess I have been using Windows far too long to switch.
Thinkpads are solid machines, though expensive. I just bought a used one and for being a few years old it is still very nice.
Looking for a used one on eBay or around here is also a solution because there are a lot of people out there like me who go through a laptop a year and take good care of their machines, but always looking for the latest and greatest. This is definitely YMMV.
I would also wait until summer to buy it because there are usually better deals such as Apple's back to school sale where you can get a iPod product or money off a more expensive one. Last summer it was a $175 rebate or a free Nano. Plus there will probably be a refresh by then from just about any manufacturer.