Well, I just bit the bullet and ordered a Henry Audio DAC from http://www.henryaudio.com/. The review from HiFi+ can be found here: http://www.hifiplus.com/articles/henry-audio-usb-128-mk-ii-dac/
With so much over-priced snake-oil (or bollocks – to use the english term) on the market, it is refreshing to find a company that is open in what it is doing; complete circuit diagrams are provided and the coding is open-source. That and the great review from HiFi+ (whom are one of the better publications I feel) made this such a compelling buy.
I’ll let you know what I think of it when I’ve had a chance to give it a good listen. Then I’ll be adding an external battery power source and I’ll let you know how that goes.