I have a fairly large room, and the sub will be about 15 feet away from the viewing area. Which of these would be better? The klipsch has a 10" driver with a 1150 watt BASH amplifier. The svs has a 12" driver but only a 320 watt amp. Does the amount of wattage make a bigger difference, or does the size of the driver make it sound better? Thanks for your help.