All things equal in terms of hi-res compatability, which provides a more enjoyable experience for the cash? I know not as many have experience with the D7, but I don't have any experience with either company. I guess my real question, then, is which company tends to provide the highest performance to dollar ratio? Definitely looking for an Amp/DAC combo unit, but unwilling to reach Nuforce HDP/Pico and beyond price levels. Trying to keep it in the $170-$250 range. This would be for a pair of Senn HD600s.