Downsizing: Separates>Integrated --PSAudio>Pass Labs

Did you ever consider the Belles Virtuoso? It is a fantastic match with the treos. I heard them together at Johnnys shop at audio connection.  The belles is a sweet dual mono amp. 200 per channel into 8 ohms. 16 amps peak power per channel.

+2 Boulder 866!! 

Coda CsIB is a pretty decent integrated.  Can be configured up to the first 18 watts in class A. 

Consider also PrimaLuna. I’ve been running their HP Integrated with 8 TungSol KT-150’s with glorious results into Focal Aria 936’s (with an impedance load that drops to 2.7).  With the KT150’s, about 100 wpc of amazing SQ. 
 

Lots of great suggestions here that aren’t new Caddy money (although Russian tubes aren’t getting any cheaper these days).

I moved from the Hegel h360 to the psa bhk 250 amp and sounds much better. IMO, you wouldn’t be saving much room by getting rid of the mono’s, just stack them in a rack or put each 1 in back of the speaker. You might want the power of the mono’s in the future if you decide to get different speakers. For a smaller room I used to have the totem mani 2’s that I drove with 1000 watt mono blocks because these small speakers were so inefficient. Keep the 300’s, if you are all digital and have a ds sr dac as you only source, get rid of the preamp and go directly to the mono’s from the dac.