Sub woofer

i'm currently running my revel f30s with a ml depth and i'm very happy with the pairing. the ml is very fast and tight and gives some weight to the f30s, which are lean at the low end. haven't heard the f208s but surmise ithey'd have similar character.

I agree with akg_ca. I have the Vandersteen 2w's (not q's) as well as Hsu subs (VTF?), and can attest that the vandy system is truly outstanding.
The HSU is no slouch, but the vandersteen crossover really does work wonders.
As bob_reynolds pointed out, HSU subs should do the job for you and save you some money that could be put to other upgrades.
Bob

JLAudio you cannot go wrong. Especially if you want it for movies

NormL

If you want a great reasonably priced sub why are you not considering a Revel B110? Typical overbuilt Revel.