Although not an OR customer I use Paul Pang's card (and his usb cable which is an amazing cable for $299, and LAN cable, of which the jury is still out.) I love the card, but have yet to put my excellent SOtM PCIe and battery pack back in to do a true a/b. His card needed 200+ hours for break in but is very smooth, analog--like, yet still detailed, with a great soundstage. I power it externally with a linear ps.