I am going to choose one to go with my Athena speakers (AS-B2, AS-C1, AS-R1). I am about 50/50 music and movies. My room is 17 X 14. The subs are the same price. The major differences (on paper) seem to be that the SVS amp is more powerful (300 Watts) and that the HSU is downward firing. Also the SVS is 60 lbs. vs 44 lbs. for the HSU. I am sure that I would be pleased with either (upgrading from a Klipsch RW-8), but which one do you all think would be best?