I am debating between the F12 and the F15 for my 1330 c.f. room and am wondering what is recommended. Dina told me via email that the F12 is adequate for a room under 3000 c.f., but then I just ran across a statement by Brian over at the AVS forum where he said this: "In addition, the decision between 12" sub and 15" subs should also depend on the woofer size in the front speakers. If the front speakers also have 6-1/2" woofer or bigger, there is no point of using 12" subs." My main speakers are the Focal Chorus 807v's, which have 7" woofers, so going by that, I should get the F15, according to Brian's advice. Further info - this will be a 2.1 system used mainly for music, but some HT, driven by an Outlaw Audio RR2150. Thanks in advance for any advice...