Whatever you do, don't buy a refurbished Gateway laptop! In fact, I'd reccomend eschewing refurbs in general. I received a G-way refurb for my b-day, and it has been a white elephant. It's got a bad wireless card, and I have had one heck of a time getting the repairs promised by my warranty. Unfortunately, it's not the kind of problem I can fix myself. I am looking into getting a new, cheap laptop, too. From now on, I am just not going to buy used because the companies do not honor their service agreements for merchandise that has already been defective once.
Unfortunately, I don't have any positive reccs about what kind of laptop you should buy, but hopefully someone will chime in with tips about reliable brands and such.