Finally got hold of a Rega dac to go with my Mira 2000 and glorious yellow RS5's.
Still giving it a critical listen, but so far so good.
Definitely a LOT more bass than my Marantz cd6000ose. Timing is spot on, and there's an altogether much more involving sound. Oh, and a much more open and crystal clear top end. Awesome stuff!
Will post back after a lot more listening...