I need help trying to decide which bookshelf speakers to purchase


Let me try to narrow it down.
I have an NAD T777 V3 with surround sound.  I am looking for two bookshelf speakers for stereo listening.  I want to keep the budget around $3K new or used.  Room size is 20' X 18' with an additional open foyer with a stair well and an opening to a hall way.  Not a totally closed square room.

So far I have tried the following speakers.  Elac UB5s, SVS Ultras, Revel Concerta 2 M16, Paradigm Prestige 15, and Dynaudio X18.  We don't have many audio stores around, so I can't listen to many speakers.  We have the Best Buys. and NFM, but not much else.  So far I have purchased all speakers without hearing them except the SVS Ultras.

I don't want to keep spending money on speakers without hearing them.  My plan is to get some recommendations on speakers, and travel to places that have new speakers so I can listen, or take a chance on used speakers without hearing them.

Let me list the speakers I have tried.  I would rate the speakers I have tried in this order (Favorite to least favorite)

Dynaudio X18,
Paradigm Prestige 15 (a close second),
SVS Ultras,
Elac UB5,
Revel M16

I noticed some speakers for sale on this site.

Totem Mani 2 Signatures,
T+A Elektroakustic TCD410,
Dynaudio Contour 20 Bookshelf Speakers


I know it's a stretch, but based on what I like in speakers so far, do you think I would like the ones I listed? What are their characteristics?
Thanks!
stttt
777 v3 has Dirac.   Makes such a huge impact that I think speaker choice is less critical with some of the quality pieces mentioned. Revel M16s I currently own are one my favorites.  Cambridge Aeros match in my theater are a great match for my 758 V3 and have a very different sound in mids that is very attractive.
brewered The Dirac works pretty good.  Takes a while to set it up.  I had to work with the Dirac folks to get it to work with Windows 10.  There was a minor coding error in the software and it wouldn't work on Windows 10.  I was basically their tester helping them get it to work with Windows 10.  I am in IT and my son is a programmer and I tried to resolve it myself, but in the end, Dirac fixed it for me.  They have since updated it the next version.  They were very responsive and great to work with.

It's funny how we have different preferences for speakers.  I did not like the Revels at all.  I never could get them set up correctly.  The bass boomed.  I think it was because of our room, and how the furniture is set up.  I think the speakers were too boxed in.  I put them in the garage with my old amp (NAD 2200) and they sound great out in the open.  I planned on selling them, but one of them fell off the freezer and broke the corner.  I duct taped it back up and will leave them in the garage now.  They can take a beating and keep on ticking.  It fell 6'
The surround sound sounds great, even with different speakers.  I think Dirac is responsible for that.  I just want a couple of really good speakers for the front/stereo.  Somehow the amp dedicates the amps to the front speakers when it is zoned correctly.  I think that's the term.  Turning on speaker B automatically puts it in stereo mode.