Cary Audio v12r OR Quicksilver Audio M60?

I've had two amps with provision to switch to triode, a VAC Phi 110 and a Cary 120S. In both cases, triode operation was less than satisfactory, no dynamics, lack of detail, and limited frequency response. My speakers are designed for tubes.
However an amp designed as a triode, BAT VK55 in my case is preferable to the other amps I've had that were ultralinear AB amps.
So, don't get mislead into believing you will get true triode sound in an amp that offers that with the flick of a switch.
I have no experience with the Cary V12 so I can't say that it would better your M60's.

I agree with RHljazz. I owned a VTL ST-150 and pentode was far superior to Triode. As for the Cary vs. the Quicky, I think it would be more of a lateral move than anything.

Shakey

It's funny how Rhljazz makes an excellent point which I have also experienced as very true. I have also owned VTL's with the "flip switch" and agree that tetrode ( not triode) was my preferred listening choice. But the beauty of the 280 V12 is that it can be switched in at 1/3 increments! Literally a full ultralinear or full triode, or any ratio of 1/3 or 2/3 of either usually presents a perfect combination based on your type of music... or overall listening preference... or even simply your " mood " at the time. And the real clincher is it can be done " ON THE FLY" for instant comparison. It is addicting and so flexible... Add your preferred tube type: midrange magic of EL34's , 'even-tempered'-across the full frequency range of KT 88's or a nice set of 6550's for [almost] a great compromise of the 2, and you're really grooving.
FWIW my replacement amps (though I still can't part with the Cary) are full triode (only) monoblocs made by Tube Research Labs that essentially deliver all the punch and dynamics of a tetrode or ultralinear while providing all the finesse of a pure triode...
I think the Cary 280 V12 is a remarkable amp in every way.
Good luck with your decision and happy Lissn'n