I'm looking for a pair of bookshelf speakers to be used strictly for music. I listen to mostly Rock, Hard Rock, Jazz. The room size is 16 x 12. Most of the bookshelf/monitor speakers , that I've listened to, seem to have that harsh bright sound, and not enough low end for my taste. I'm looking for a warm sounding speaker with a decent low end. Any suggestions? My budget is approx. $400-$500 msrp. Used speakers are fine as well. Thanks.