I heard the MSB set up at the Newport Audio Show and it was, hands down, the finest digital I heard at the show. Little did I know it was a CD playing and not some kind of streaming. It took only two notes and the start of Harry Connick singing and I was hooked. It was the cleanest, most natural sounding digital playback I've heard, anywhere.
(I haven't heard a lot though so grain of salt and all)
I couldn't tell you if it was the Diamond or Platinum but it had the Femto clock in it. If I could afford that set up (the DAC and transport) I would be sorely tempted. I know it's not the latest thing to spring up but it does sound beautiful and it can play lots of different formatted discs and stream as well.
Good luck in your search,
All the best,