Gotta love all the adjustment options. they make it that much more fun to mess with your system and find what works.
I am currently using an Izmo M1:

To convert USB to SPDIF. It's an async design using the XMOS chipset, and it does in fact seem superior to the built-in USB on the V800. Unlike spkrs1, I think the V800 USB is great on its own, but this thing does help turn it up a notch.
Also, if anyone is interested: I have a review up of the new Lake People amps over at InnerFidelity. If you are interested in Violectric on a budget, the Lake People line is sure to please.