Should I upgrade from REL/510 subwoofer to REL/812 subwoofer?

Hello all. I have a two-channel/HT set up in my man cave.  I use it for two channel music, multichannel music and movies/tv, in that order.

I have B&W 804 speakers and a  B&W CC speaker which are driven by an Anthem MRX 540 Pre-amp/receiver (100w x 2) and an Anthem MCA 325 Gen 2 power amplifier (225w x3).

My room is 14 ft. long by 12 ft. wide.  I use Anthem’s ARC Genesis room correction software.  It works great.  My room is acoustically treated with GK Acoustics bass traps,GK Acoustics panels at first reflection points, and GK Acoustics panels located behind my listening position.

My dealer sold me a REL S/510 about a year ago and I love it.  I have an opportunity to trade in my REL S/510 and upgrade to an REL S/812.   My net cost after trade-in will be around $1,500.

Looking for recommendations and opinions from REL owners as to whether I should pull the trigger.  Not entirely focused on the net cost, but rather the bang for the buck, value for the money, etc. While it is a great subwoofer, I am not considering the REL Carbon Special for many reasons, not the least of which is that I would like to stay happily married!

I don’t have room for two subs, and no disrespect meant fans of other subs, I would like to stay within the REL line.

Thanks!