Quick update: This isn't based scientific a/b testing, but purely on listening to the music - and I'm going to increase my score related to the imaging from my previous 10-15% to 25-30%, but with a slight concern that it doesn't appear quite as warm sounding as it did.
While I am aware this is very subjective, it does seem that it is improving the imaging substantially. I'm not sure whether the reduction in warmth is my imagination, but I seem to recall reading that Bob Stuart has said that increased jitter can lead to music sounding warmer (and, one presumes, v.v.).
Let it swim at volume 1 for a couple of days. Turn off DSP speakers at the back if you want. To speedup if there is any burn-in required rather than brain adjusting to less noise.
In a week I will swap out the AQ Diamond RJ45 and see if anything is out of the ordinary when running on the Sooloos audio endpoint LAN.