Goldenear Triton One R vs. PSB T3. vs. Spendor D7...

For what you’re looking for, of the three I’d think the Spendors would be your best bet.  However, in that price range I’d hands down choose the Joseph Audio Profiles over any of them.  JA speakers are outstanding when it comes to imaging, soundstage, and pulling off a disappearing act, and the Profiles benefit heavily from “trickle-down” technology from their pricier stablemates.  Just my $0.02. 

Yup.  Instead of the D series, consider a Spendor speaker from the Classic line.  https://www.spendoraudio.com/classic-loudspeakers/

Shahram
I have both, Rogue Audio monoblocks and April Music Stello ai500 with a built in DAC. Both power up more then what the D7's need. The tubes can take EL34's, might be the ticket.

Soix
The Joseph Audio Profiles are nice and I heard them with a Rogue amp. However they are rather small and might lax in the bottom end compared to the Spendor's and the others.

The Profiles are very similar in size and weight to the D7.2 and look to go about 10Hz deeper in bass at -2dB.