Like @DaveA said if these were closer they would be gone...… these stomped everything I have had in the past and why I will never part with mine and scoop up K510's anytime I can find them. The price of these can't be beat.
Schu - Thanks I hope you get to own a horn sub at some point with the scala's.
Mookie - I think this is going to my Dad for Christmas to use in his shop with KP-301's.
What John said....I believe most "small" setups are a 510 or a 402 on top of a scala bass bin, I've been looking for a used set of bass bins for a while with no success as I have a pair of 510's sitting idle.
Go big or go home as they say, you will be fine with that sub in that room. I have a THLP horn sub that is 24"x72" in a 11ftx13ft room :), blends just fine.