Ok. I'm finally ready to declare victory. I have on MCH/Video server up and running (endpcnoise fanless monster with lynx card), and one 2 channel server (caps 3 with SotM USB and battery).
The MCH/video server has movie rips (e.g. a directory of "classics", "favourites" and "queue" to watch), concert DVD rips, family videos and all my MCH audio content (SACD and DVD-A rips). I can switch between "The Godfather, 2012 trip to Italy, Adele at Royal Albert Hall, and Beethoven 7th symphony in 5 seconds). You need a certain amount of with so much content at your fingertips - it is a little overwhelming. only thing left to do is tag an index my "preprossed" SACD rips. I organize by composer instead of by performer, so if need to move tracks between folders and rename track names. Bit of work, but very gratifying (as opposed to troubleshooting hardware).
On the hardware side I am now playing with a PS Audio DirectStream, I ordered a Mytek and I will be comparing the option of 3 x Directstream for all channels, MSB for mains and 2 x Mytek (with synchonized masterclock) for other channels, and MSB for mains and 2 x NAD M51 for other channels.