Regarding M9 vs Conductor V2. If you look closely, the SNR of Conductor V2 isn't much of an improvement over the original conductor. It stands around ~ 90+dB which is considerably lower than the 130 db SNR from m9's specs.
Don't get me wrong, I owned Conductor and it was a good amp, but in terms of cleanliness, transparency, details, it was no match for Master 9. Conductor was however a little more energetic than Master 9 that sounds a little more relaxed (but it is also very dac dependent, so I would state that this is a transparency related side effect).