Dear Dkarmeli,
in the beginning of my digital adventure I was very sceptical about all the gimmicks you are describing: upsampling, wordclocking etc. As the dCS stuff is a real versatile system I still doubt that all users do know about the different possibilities these units offer. i don't like to know how many are using 50 Ohm bnc cables, maybe in different lengths (!) or do not use the right connectors (yes there is an impact on reflection). digital cables are a complete different issue, there are basic technical parameters to be followed but it's also more than 1/0, you may know this.
to keep it short, yes upsampling, using the right filters for the matching music makes a huge difference on sound. If you know how to handle you will be surprised about the terrific sound it can result in.
not using a master clock is giving away a good portion of the good sound.
you really need to test it. proper clocking is one of the most important issues in digital reproduction. Reaching more accuracy by a rubidium clock - in combination with the stability the master clock is providing - is worth a try. Of course you need locking the additional clock in the system properly, also using the correct menue options of your master clock.
If you wouldn't be so far away I could demonstrate all the different effects. On the other hand you may be right when asking why is it so complex finding a satisfying way for reproducing digital sources like CD and SACD. In our beloved analog field it is maybe the same. Yes, you could end up with a 1000 dollar unit, coming with tonearm, cart, phono pre and everything you need to get sound from the grooves. Would you happily settle on this? I believe No!
As you are working on your FR (cabelling - I did lots of recabellings, some I kept, so on the SME 3012 Ia or on the Ortofons) this shows the favour for improvement and testing. I don't have the vacuum lips you got on your blue micro, I had them on the SX II. I tested different turntable plates and finally settled with an Audio Technica AT6278. Also discovered when fixing the additional platter very hard to the Micro platter it improves the sound. Using the original RY-5500 motor I built in a very good new 240 V power supply to reach more precision and stability. Despite the results were very promising in the end I went for the VPI steering system providing me with even more possibilities.
When configurating the three units (motor, table, fly-wheel) I also realized it is the best to isolate all units on separate artifical coral platforms thus avoiding vibration interactions. The vacuum pump got a separate damping box (btw nice and clever design :-) and is completely separated from the rack - this is the worst vibration source.
Yes, the Neumann DST-62 is a very special cart. I am not sure if a Neumann arm (one has to find such a rare thing!) may carry all the positive characteristics of the cart. The EMT 997 and the SME 3012 Ia will do. I use the SME on my EMT...
What about your system besides the blue micro and the 927? Among your many tonearm/cart/phono configurations which one is your absolute favourite?