How much is about the recording

Thanks Tom, I certainly have enough of those artists to sample the range of recording quality you're describing. 

Mike

Tomcarr and tooblue, for comparison, would you mind providing a few examples of recordings you have that fall into each of your A, B, C, and D categories. Don’t know what you listen to, but if you could pick a few examples of recordings that are fairly commonplace, and many of us might be likely to have, that might be helpful. For myself that would be among other things ’50’s-70’s jazz (Charlie Parker through to Weather Report) and rock ’n roll from the 60’s-70’s (Bill Haley and the Comets through to the Sex Pistols). Thanks,

Mike