The AV123 speakers and SVS sub that Mazer recommended get good reviews around here. I suggest that you go listen to speakers if at all possible. You can do that at places like Best Buy, as specialty audio/video shops, and at your friends house. There are also internet direct companies (like AV123 and SVS) that will let you return items within a period of time...just check how much it will cost you in shipping.
Speaker preferences are very personal - what one person likes, someone else might hate. Some people love Paradigm speakers, while I have yet to find a pair that I like (that's just an example). That's why I recommend that you go listen to them.
Good luck, and enjoy the hunt!