Hi again...and you're welcome....
What I mean by the bass being a tad loose is while the bass note is played low it's not as well defined as I prefer. Said another way, the bass is played with much gusto just not with the bass note distinctions that I prefer. However, given the price point.....
What I mean by the bass being a tad slow....sometimes it lags behind the rest of the music just a little bit and enough to annoy me. Someone else may not notice it or even care but it just an irritation to me. ..Again, given the price point I am probably expecting miracles...
By the way, I've heard the Monitor Audio speakers before and I do like them. I think the VDAC would match up well with the already good midrange of your speakers and would help to smooth out the high end. It's the bass delivery that I would be most concerned about....as best as I can recall the M.A. deliberately slows down the pace of the overall presentation in order to get the accuracy right....given how the bass of the VDAC can be a tad slow...and you get the idea....the pairing might sound great overall but even slower still....but then it's all a matter of personal tastes....
With regard to connectivity...I only used the USB connection for the PC and the Coaxial for connecting to the Belles Pre-Amp. Of these two connections the coaxial far and away delivered the best results. I have no other comparisons to offer with regard to optical.
So, that you are better informed....the coaxial wire is cryo treated and the connectors are Sxhadows..My cable set is a custom job by my friend/local audio dealer at Blue Marble Audio.
Hope this info helps...don't hesitate to ask more questions if you have some.
Take care and now I'm off to quality control some Guinness. Have a nice day.
LeRoy