One issue that has not been brought up is that the USB input on the XDA-1 is limited to 16/48, if that's an issue for anyone. I'm pretty sure the HRT will accept a broader range of sampling rates over USB. My collection is CD only right now, but I want to get into high-res eventually, so I'd have to buy a S/PDIF converter and place that before the XDA-1pm the signal path.
