Sourcepoint 8 or Sourcepoint 10?

I’ve owned the 8’s for a year and have them in a much bigger room than yours with dual SVS 3000 micros crossed at 65 hz. I can’t say enough about all the things these speakers do WELL!
 

Various test of the 10s… the first version of the 10s that is, show they go lower but they are a lot brighter.  Since you have a sub, you probably don’t need the extra extension of the 10s… but you may not like the top end if you have a live room or are sensitive to brightness. 

How low of a listening level are you hoping for… the 8’s are very good at 65-70 db. 

One of the nice parting gifts that Mr. Jones left MoFi was the upgradable crossover. 
https://www.mofielectronics.com/products/mofi-electronics-soucepoint-10-master-edition-upgrade-crossover-kit

if you find that you’re happy with this speaker, maybe one could save for his new offering. 
https://jonesandcerreta.com/speakers/

One can wish! Good luck with the search

@snapsc 

Thanks for the insight.  I actually have an SVS Micro in my TV Audio system and the cost of the used ones on the market are great.  I think the 65-70 db level is about right.

@gkelly 

After looking at the extreme cost of the TAD speakers Mr. Jones designed, I am concerned that his new one may be well out of my league.  Plus a tilted up floor stander does not work for my space.

Just a few more comments about my set up so that you can see how it relates to what you are trying to achieve.

I have my SP8s on the stands that come with them.  The front of the speakers are about 30" from the rear wall and about 8' apart.  The subs are outside the speakers and are about 5" from the rear wall....but I have them oriented with one driver facing forward and one driver facing the rear wall (yes, a strange positioning but the best overall bass in my room).

I'm streaming Tidal over the Lyngdorf TDAI 1120...60 watts per channel....which is plenty of power to play LOUD if you so desire.

Not using Room Perfect or the PEQ...in other words, just listening in "neutral" mode on the 1120, the 8's are smooth but detailed, throw a huge and deep soundstage...and the sound doesn't disappear when you stand up.  I've owned a lot of "types" of speakers over the years and they all have their strengths and weaknesses.  The 8s were my first journey into concentric drivers...count me as a big fan...they just sound good on virtually everything.

These aren't mine, and I'm not sure I would buy a modified speaker but these just popped up on USAM.

https://www.usaudiomart.com/details/650311240-mofi-sourcepoint-8-with-gr-research-crossover-upgrade/