Subwoofer

Dual rel subs are a good option for filling in the mid low bass like bass guitars very well. But for the super slam of HT and organ music that you can feel, Earthquake Sound has something called the tactile transducer. When mounted under chair or couch, your bass will no longer be an issue. 5-40hz. 

Budget $2000-3000.

I have multiple speakers that I use to compare and keep things interesting.  

Thanks for all the suggestions.  A complex subject for sure.  

I have 2 SVS subs, smaller room SB3000 and larger primary room SVS SB4000. Smaller sub RCA  hook up and larger balanced. Love them, as they are both operated via Bluetooth for their adjustments. No more getting up and down 400 times to adjust things. Both of mine integrate well, never here them per se, as its supposed to be. Both 2 channel music systems,NOT CHEAP.  Great warranty too. Robert TN

@jpwarren58  : Not complex, it could be complex if you insist in only one subwoofer and do not care about the very high Intermodulation Distortion and Total Harmonic Distortion the Ryan speakers havs.

Subs: HSU or Velodyne.

R.

Suggest you look at B&W’s top line of subs, the DB series. My Magico dealer recommended them. My JL Audio f113 sub craped out so needed a replacement. Bought a pair and they are excellent. Easy and fast to integrate with my Wilsons using their onboard software and your smartphone.