I have spoken to Sevenoaks about a demo, they are very helpful and I will take them up - store demo, didnt ask about home demo
If you don't get a home demo, see if you can take your 506 along to compare with. I have done this myself in the past, although it was more to test compatibility of my old G98 against a shortlist of TV's.
I also found that baby curtailed a lot of my audio listening - my son seems to have super sensitive hearing so I rarely found myself in the position to get volume to levels where SQ between my old squeezebox and G98 was troublesome. Convenience won the day.
With MC200, SQ via analogue is not going to be bad and if/when funds allow and listening is critical, adding an MS600 zone (or whatever is current at the time) in the critical listening room will beyond doubt boost the SQ well beyond what you are already accustomed to and you get to use the MC200 as a source for another audio zone.