As an aside, I have a play list of songs that I keep for comparisons, same ones I used to audition the new amps and pre-amps I looked at.
Also, in switching out my NAD M3 I also switched out my pre-amp (the NAD M3 is an integrated). So now I'm really comparing my Bryston BP26 and my 4B SST2 to the NAD M3....don't know if the changes I'm hearing are due to the pre-amp, the amp, or both...