Jim,
First of all your headphone amp chassis lookes bitchin

. Love the red face plate with white lettering. You should try also Dark Blue with white as well. I'm looking forward to your PA-10 amp. Should be nice for the 96dB speaker crowd.
I was wondering what you are using now for your PC audio setup. Here is what I have planned, let me know if you think there is better:
Foobar latest version ->
www.usb-audio.com driver -> HagUSB -> Peter Daniel NOS dac. If you think another version of foobar or a different driver is better, let me know.
Thanks,
Anand.