I have the st4's for mains, sc2 center and st2 rears, I have 2 rooms, 1 ht and 1 music, I use aerial speakers with krell in my music room, I used to change my ht room around a lot, I used dyn's, ACI saphires, etc, I have been using the NHT setup for some time now, and have finnally found a setup that I like, the st4's give you a great full range speaker at a very reasonable price, they are not hawked on this sight like ACI, but imo opinion, they are a much better speaker, good luck