Speaker match for MC275

Another vote for the Tannoy Prestige range with the MC275. Will be supremely musical if that is what you are seeking.

Verity Finn was a great match on my MC275.

I have B&W 804S with my MC275. Very good match, but I often wonder if there is a better match for the 275. One thing I do know, though, is the N802 in your short list would need more power. Maybe 2 MC275 could drive them well, but only one will for sure be too little power.

FWIW, I did audition a pair of ML (can't remember model) and thought my 804S sounded better.

That's a great sounding combination you have there - irrespective of the passage of time. I would refurbish/service the SL3s and retube the 275 - and then do what Horatio says and get a second 275.

Avoid any Dynaudio with that amplifier... it is far too slow, gooey sounding of an amplifier - not enough guts to properly drive a Dynaudio speaker.