Seeing that you got the room acoustics problem solved, why not another pair of the B15s or B25s? They have been replaced by the new Image series and you should be able to get them fairly cheap if there are any left to be had. I would also go with front ported speakers over rear ported speakers any day based on placement. Rear ported speakers can not be used close to teh wall which makes them unsuitable for placing them on the wall.