I have to agree with Velo62 and the others above. Given your preference for heavy metal CD's, adding another tubed amp (MC275) still wouldn't sound as good as adding a Mac SS amp.
I do indeed run two MC275 IV's as monoblocks driven by a C200 Pre. But I play mostly classical and jazz and my source is more often vinyl than CD. With that combination it is heaven.
I do indeed run two MC275 IV's as monoblocks driven by a C200 Pre. But I play mostly classical and jazz and my source is more often vinyl than CD. With that combination it is heaven.