I've found DAC reviews most anywhere to be very hard to glean anything from (that includes those on HF.) It's actually easier to review a DAC as it relates to headphones as anyone plugging in an HD800 into an Invicta is hearing the same thing. But a review about how a DAC affects one speaker system is really not something to rely on, especially if you use different transducers. That's why demos are essential.
The differences between good solid state SD DACs are way smaller than reviewers make them out to be.
I agree - It's much easier to review headphones or speakers compared to DACs. This coming from a guy who has written way too many words in attempts to convey the sound of this DAC or that one.