Hi Max,
I bought a NAD M2 not long ago. After a looong break-in, and spending some time on speaker placement, I can say the sound very much what I was looking for. It is quite detailed, revealing and dynamic - and it circumvents the DAC.
I agree with Jrinkerptdnet - something upgradeable makes a bunch of sense (the M2 is not). I believe the new NAD 390DD is one such amplifier. (I'm not trying to advertise for NAD, just so-happen to know of the 390DD, and of course own the M2)