I am looking at buying a surround sound system ang gor a few questions about what sub would fit well. I am looking at maybe getting the RF-7 or maybe RF-82 recommended systems w/out the sub. I am looking at the Klipsch RT-12d, JL Audio F113, or maybe a SVS. The room is 23x24 with a cathedral ceiling rising from 8 to 12 feet. I was wondering if these subs are big enough for the size of the room? The system will be used mainly for TV/Movies and some music. looking for opinions on these subs or maybe others that might fit better.