Alex,
Have you experimented with the Slim Devices Transporter. This device seems to take out all of the factors of which you complain about PC audio. Linn has even jumped on board with their $20,000 Klimax DS. Both are network servers. So, if you stream wave files over the ethernet cable, no processing. The Transporter with a great DAC should equal or best most stuff on the market. Maybe not your players, who knows, but have you tried a network streaming device. You are right about PC audio. This is probably a dead end, as well as USB DACs, but network streaming seems to combine the best of both worlds. If you added an ethernet port to the NWO, that would be exciting for me.
I have a rubidium clock hooked up to my transporter right now and it sounds pretty good, but the dac is certainly inferior. I would love to hook up my transporter and clock to an Alps DAC. Is it out yet?
Thanks,
andy