Mcintosh MC275 alternatives?

Depending on speakers…. I wouldn’t rule out the Atma-Sphere M-60 or the Atma-Sphere Class D

Quicksilver “40 watt Mid Monos. Not pretty but no better amp available.”

Ugly amps need love too 

I have owned these amps since early 2015 .  They were only 13 months old when I got them.  I can not say enough good things about Quicksliver in general.  I have Mike’s Headphone amp and that is phenomenal too.  It’s built like a tank and super reliable like all Quicksilver amps    
 

I bought a new preamp last year and it really demonstrated how great they are  

Excellent value  

Rogue M180 monoblocks. I own the "dark" version, as well as a pair of MC-275 MKVI. The M180’s are more powerful and more transparent. I think they’re one of the best amplifier buys in audio.

Audio Research New or used
Conrad Johnson Classic 

VAC

The MAC haters hate to hear it but the one dude is right, buy a used MC275 so you can enjoy forever, or a short while and get most of your money back.  Great advice.