A list of efficient speakers at ~$5K a pair.

Spatial Audio open baffle X5 or X3's 97db efficient with  powered subs so very amp friendly. Used all under $5k a great speaker. 

the used Volti Razz, 97db, 6 ohm nominal, they say use 8 ohm taps

Talk to Tony at Tonian Labs to see if he has something to meet your needs.

I got the Volti Razz in its "Decorator Series" guise. That saves you $2000 off the list for a finished pair (so, $5500 vs $7500). I got then painted at a furniture refinishing place, and they did a great jo. You could do it yourself. It comes in plain Baltic Birch, and can be a blank slate for you.

I think they are 97 db, and my 8 wpc SET amp drives them with ease. 

Again, I very much appreciate the feedback I have been given. I am in process of researching the speakers suggested. I find myself thinking that I initiated this post somewhat in haste and maybe should has given it more thought. 

I Currently have 3 amplifiers in use in this system (have another system for the living room). They are: Pass XA25, Aric Audio Transcend PP tube; and a PS Audio S300.

The Pass and Aric amps are in use with the Fritz speakers. The Pass and the PS Audio are used with my Magnapan LRS+ speakers. The PS amp provides greater power with far less heat for summer months. 

I have been toying with the purchase of Aric's KT88 SET amp provides from 7 to ~ 20 wpc depending on tube and mode used. I have driven the Fritz with the Transcend PP rated at 16wpc using EL34 tubes in triode mode quite satisfactorily. I have been in contact with Aric regarding using this SET amp with the Fritz. I totally agree with @scotandholly that the Fritz. are hard to beat, even at 2X their price. 

My thinking is that there are not many speakers below 10K in price that would fit  my room, have the flat 8ohm impedance and modest swing in phase angle of the Fritz Carbon7, and better their true 89dB sensitivity by 3dB. 

Thanks again for your attention towards my quest.