The Subsonic10 retails for $2000 and the Sub6i retails for $750. I am considering these two options because I can get close to dealers cost on PSB. My room is fairly large, 24x24x9. Right now I have 2 Athena AS-P400's and would like to upgrade. My question is would the additional cost of the Subsonic10 be Worth it or should I just go with 2 Sub6i's.