Thanks to all for input.
Rotarius - I did upgrade the power supply. Snipped off the wire and connector from the V-DAC wall wart and connected it to a Pyramid PS3KX3 power supply. Been using that for some time now. Messing around with ICs right now. I can definitely hear differences in high end extension between two pair I had on hand. Maybe different ICs (and possibly software, as you and others suggest) would be better than changing out hardware. Still tempted, however....
Willie - If I did the BiFrost I was planning to get the analogue upgrade but not USB. Would use V-Link for USB to Coax instead.
Thanks again to all.
Rotarius - I did upgrade the power supply. Snipped off the wire and connector from the V-DAC wall wart and connected it to a Pyramid PS3KX3 power supply. Been using that for some time now. Messing around with ICs right now. I can definitely hear differences in high end extension between two pair I had on hand. Maybe different ICs (and possibly software, as you and others suggest) would be better than changing out hardware. Still tempted, however....
Willie - If I did the BiFrost I was planning to get the analogue upgrade but not USB. Would use V-Link for USB to Coax instead.
Thanks again to all.