I agree with Mike at Audioclassics but I always agree with Mike at Audioclassics.
I also agree you should consider the new C70 since its an all analog design and you don't need a built in DAC with your Metrum. Of course, if you go with the MC275 you will be pining for your blue meters so you might consider a C70/SS amp combo if you decide to trade the MA6600.
I recently traded in my C42 for the new C70 and I am pairing it with an MC2205. I am loving the sound and after a few weeks of testing it has now replaced my EAR 834P phono stage.
I also agree you should consider the new C70 since its an all analog design and you don't need a built in DAC with your Metrum. Of course, if you go with the MC275 you will be pining for your blue meters so you might consider a C70/SS amp combo if you decide to trade the MA6600.
I recently traded in my C42 for the new C70 and I am pairing it with an MC2205. I am loving the sound and after a few weeks of testing it has now replaced my EAR 834P phono stage.