Finally bought my subwoofers...Sumiko S-10

I have looked at all the major players. SVS, Hsu, PSA, Rel, Rythmik, etc. I had a Rel Storm which I always liked the way it integrated. Therefore, I chose the Sumiko, which IMO is a clone of the S-5 Rel. The difference is the speaker material, one alum (rel) the other fiberglass(Sumiko). Both have 500/550 watts class D amp and 12" drivers and Passive Radiator. I ended up getting 2 of them, though that was not my initial plan. One may have been enough, even though my room is 5K cu ft+.
These subs go deep. They are rated at 22hz but I have played St Saens 3rd organ sym with no trouble. That supposedly goes down to 16hz.The S-10's handled it very well.

I considered the ULS 15 from Hsu. But my experience with Rel and its magical interface with the main speakers lead me to the S-10. Plainly put, I like the way my main speakers sound with the S-10's. They sound much larger that they are. There are details I’m not sure I’ve heard before. The S-10's do everything I wish including plumbing the depths of the bass. There may be other subs which do as well. Some say others do better. But most of the reviews are from HT users. My system is a 2 channel stereo and even IF the S-10's don’t go as deep (I doubt it) they do everything right for 2 channel music. Would I buy them again? You betcha!