I've made some changes feeding the Oppo that have yielded even better results. I had dropped back to my WIN8Pro image because it supports the HP media remote with Jriver and I couldn't get it to work with a 2PC Jplay setup. I decided to give Windows server 2012 a shot in single PC setup using Tchuyev's optimization script at the link below (step 1 and step 2 for the audio PC). Wonderful improvement over using the JKmkIII for async USB, with either optimized WIN8Pro or stock server 2012. With an optimized server 2012 setup using DLNA and dedicated Ethernet to the oppo with Jriver MC18 and Jplay, what a treat with lush mid range and clean high/low transients and much simpler than a 2 PC setup. The only knock I could make was that on the loudest complex passages there was blurring but that could just be the limits of a stock oppo needing a better power supply or my amp. I'll find some other way to use a remote for theater view :<)
http://jplay.eu/forum/computer-audio/windows-server-2012-from-gui-to-core-the-easy-way/
http://jplay.eu/forum/computer-audio/windows-server-2012-from-gui-to-core-the-easy-way/