Which Subwoofer

I am a multi sub/swarm acolyte.  Upgrading my current dedicated media room, but will move one day and build from the ground up a room 2-3x the current size.  Anything I do will be moved to the new room.  The current room is 2200 cubic feet of space.  I have put together a 7.4.4 Dolby Atmos room.  Now that I have put accoustic treatments in the room the highs and mids are great, but my 2 B&W ASW610 just don't have the oomph of low end.  Yes, I installed several diaphragmatic absorbers (Acoustic Fields) to keep the room boom down.  I have started to add amps to use in the new room.  Current equipment

Denon AVR-X6700h
Anthem MCA 225
B&W CM8 S2 LCR
B&W in walls and in ceiling.
Will put the 10 inch subs in the rear corners

Possible upgrades for the new room 9.5.6, Legacy Audio Aries, Marquis XD Center, Silhouette sides x4 and Rear wall, Stratos 8 ceiling x6.  Will add an 18 inch sub in middle rear of the brands below and add another 2 of the subs below to the side rear.  Anthem MCA 525, and another 2x Starke AD4.320 amps.  Will replace Denon with Trinnov, Storm Audio, Acurus Processors.

Which of these two subs would you recommend?  I want something between SQ and SPL because I listen 2 channel, but not critically.  I just enjoy good music of all genres.  

Salk Rythmik G25 x2
Seaton Sound HP+ and HP-

Size matters so nothing bigger than 20" wide.  Height and depth not so much, but the two above meet all of my requirements.  I want something the digs deep.  I also want something that brings value.