Need a "short list" of best Subwoofers for M.L.'s

Settled on a pair of Paradigm Servo 15's. They are very fast and musical. I run my Dunlavy SCIV's full range and only add the subs for support and weight below 50hz. I would put any and all subs on Audiopoints or Sp-1 platforms .These devices make everything quicker and more tuneful as well as extending the soundstage width. .How would you figure these devices would improve midrange quality and detail while being under a subwoofer. They do.

The ACI Titan is a very Musical Sub.

Best match is the Descent. I have Odysseys with ACI Titan II LE but after hearing the Descent I wish I had got that instead. The Descent has very tight bass, no boominess of any kind.

I was distinctly underwhelmed by the Rel Stadium III I heard.

Martin Logan just came out with this sub that uses 3 10 inch woofers and a 400 watt amp, that the Absolute sound raved about. The name of the sub is the Descent. It lists for 2700 dollars.

Listened to both the descent and the depth with Ascent and Odyssey. Both subs are musical, not boomy. Listened more to the descent, which I prefer for my room because of size (<3200 cubic feet)