I have B&W DM302s all around. They are bookshelf/stand mount speakers. They are only +/-$175 per pair used and will outperform most low-cost speakers. They have a soft dome tweeter, so they will make Sean happy. Very efficient/sensitive also (91db), so you won't need a ton of power. They are a former Sterophile Editor's choice.
You could also pick up the new DM303 for under $300 per pair brand new.
This link is to the Stereophile article on the DM302. The picture is of the new DM303.
http://www.stereophile.com/showarchives.cgi?542