Flaws in this chain?

Yes I have tried better cables. Let me rephrase that , Yes , I have tried more expensive cables not really better cables at least to me. Not sure why I would want to try a Sonos, I am sure it's a fine streamer but I am happy with my Micromega. 

Cables no, sources yes but nothing drastic depends on the source, whether it's a newer CDP or an older one and what DAC is used  or a file off my NAS or transport to a stand alone DAC . Not sure where you are going with this, like I have said using different sources, amps, pre amp, integrated amps some with DAC's some without. Cheap cables, expensive cables I have never heard anything I would attribute to jitter in the last 20 some years. Now an old I believe technics or sony  CDP with  a 14 bit DAC  I had in the early 1980's did make a piano sound a little like a harpsichord which I would agree was probably caused by some jitter. From the information I have found  from my reasearch which I always do on these types of claims on pro audio sites jitter in well designed modern DAC's is not a problem and hasn't been in 20 years.  I'll reiterate, I don't hear it so I don't worry about it. 

Ok , thanks for the information.