I just sold 20K of Pass Labs ...250.8 amp which weighs 100 pounds, and an XP 22 ..2 piece preamp.
I bought a Coda Csib V1 which is suggested above multiple times.
My big Harbeth's have never sounded better. The synergy between Coda and Harbeth is absolutely amazing.
It weighs 55 pounds, but its very easy to move around.
The Coda Csib V1 should be on your short list. I have the V1- 150 watts in 8 ohms-doubles in 4-and doubles again in 2 ohms. Absolutely amazing Integrated amp.