Hooked right up to mid 2009 Macbook Pro 13" Lion usb. Itunes library (44.1)sounds great, as does iTunes radio BBC 3, and Rhapsody, and Linn 320k internet radio.
Cancelled Bifrost when it delayed 1 month. Tried Marantz NA 7004, but did not work out. My V-Dac II will be delivered tomorrow. I'll be using my Macbook pro for source.