I'm using Klipch's now but they are well out of your price range. I've also got a set of older Altec's (10 years old) that still sound good (but were also over your price range when I got them) and just recently got a set of USB powered Logitecs for my laptop (and are also slightly over your price range) but, unless your looking for something portable, I wouldn't recommend them for normal use (but they are great for a laptop).
Stick with a name brand; Altec, Bose, JBL, Klipsch, and you probobly wont be dissapointed but get at least 2.1's.