ANYTHING from PSB. they make very good bookshelves. Also Epos and Usher. Neither of the two latter brands will leave you lacking and punch way above their price/weight.
Budget minded bookshelves
I'm beginning to build my budget college setup (I'm a freshmen) and am really confused when it comes to speakers because there's just so many choices. I already have an Onix SP3 MKII integrated amp and a Fubar II USB DAC. Right now I'm looking for some decent bookshelf speakers in the $3-350 range used. That price does not include shipping. Any ideas? I'm looking at mainly B&W DM602s and PSB B25s. Since I'm around 150 miles from any kind of dealer auditioning isn't an option -- but I'm okay with buying and trying, and selling if necessary. None of the dealers I can find have any "low-end" stuff in stock.