Speaker recomendation

there always seem to be some very nice Meridian active gear on trade in as owners move up the line..check in with some of the  bigger USA dealers, you might be stunned at what is available 
Stereo Design in San Diego always had 2-4 pair before owner retired...

And finally as a 2nd home owner where music is also hyper important, I purposefully ( and with a lot of guidance from my mentors ) set out on a somewhat different path than my main system.
i chose one button iPad controlled streaming and NAS drive access for spouse and her family and sweet pure analog for me, trying to not duplicate TT rigs in two places....

everybody has a different flavor

you seem like you are spending a lot of time thinking first :-)

I thought I would post separate about Made in USA...

again a bit of bias explained: for 35 years I made a living working for global corporations with customers and supply chains stretching the globe... indeed most of it at America’s largest exporter. Trained as an economist in the Chicago school I am pretty confident in a few basics...

finding an American Made speaker , 100% neigh impossibe... in the case of Vandersteen, RV tries to source USA but he also sells globally, certainly a balance to be sought there...but in the end super high value finds a home in the product: SEAS drivers, Vishay and WIMA, cabinets built in house, Aerospace grade CF, veneer from HighTek, etc...
anyway.... just something to consider...

Igoler- well thank God and some of the sweeter words and notes have not put you off....
some thoughts.... again with my known bias...
great sound at the 15’ mark is certainly doable - using Jim Smith setup rule of 83%, that would put your speakers about 12.5’ apart...
you could get new Quattro with powered integral sub but as you say significant $ going into the cabinet - explaining the quarter million pair seller Vandersteen model 2 and 3, the $$$ goes into the sound not fancy veneers and a pretty cabinet.
as Stringreen so aptly points out you could also get a pair of used 5a which come with IMO a world class subwoofer... and a switchable rear firing tweeter for when you want more room fill, 10% distortion but pleasing in the right situations....
glad you are having fun!!!!!

Dear OP

hopefully the net effect is help from this community

how is your search going ?

jim

We might have a similar space / issue....

have a 36’ long x 15’ x 10’ to 9’ sloped feiling with wall of windows cantilevered over view of Puget Sound ( So drapes and acoustic treatments on those windows ain’t happening- we opted for a mix of Totem floor standers and in ceiling for fill with switches on the in ceiling only.
having said that. This is not my primary 2 channel critical listening rig.....
the questions about music, use and what wall are speakers going on are spot on
??????
i ran AMROC on your room assuming 9’ ceiling.... certainly some very interesting nodes going on, might seek some room treatment help, several mentioned GIK, Lambvin, Acoustimac, ASC all really good, as others may have mentioned a sub with EQ might be good and or DSP


beware dealers running other product down..... enjoy your search !!!!!