I am a SVS fanboy due to being absolutely happy and impressed with my PC13 Ultra. I paid the same money for it as I did the Velodyne it replaced, the SVS was so much superior I couldn't believe it. It's a true "sub" tuned at 20Hz and by plugging the ports it can go even lower. I have no doubt you'd be happy the model you're looking at. My room is about 14x24 and large open doorway in the back, it pressurizes the room fine, you can feel it in your body, intense in movies like Saint Andrea's Fault and the like. Besides a free audition, what's to lose.

I really like the results from aluminum woofers. If a paper cone is highly efficient it will actually outlast some of the space age cone material as the paper don't have a surround to pull away and being high efficient the cone barely moves. If you've ever seen a Klipsch with paper drivers or a pro driver you'll notice the large woofer is hardly moving.

My friend is a Legacy user and the best sub he had was JL Audio. He currently uses Legacy subs but I think out of loyalty or consistency, my opinion there is better. Cool you have Legacy, that center is killer. My friend had Focus SE's but recently popped for the V's. But this reduced his system components so he can sell somethings. I digress, LOL