I'm looking to replace my hi-fi amp and as space an budget are tight I've narrowed my choices down to getting a used or ex demo Rega Brio or Audiolab M one amp, has anyone heard both or have any feedback on either amp. I'll be using it with a pair of Mission M71 stand mount speakers (which will be upgraded next at some point in the future). Having a built in headphone amp is quite important to me as I do about half my listening using headphones. I'm leaning slightly towards the M-one at the moment as one of the sources would be a Sonos Connect and I think the M-one's built in DAC would be better than the DAC in the Sonos connect. Any suggestions or feedback on either amp would be great.