This is what I could find in 30 seconds of searching:
Chord Qutest DAC (Rob Watts designed):
“From pure performance point of view, the CHORD Qutest nails all the tests I threw at it, garnering the top spot in DACs I have tested.”
"The CHORD Qutest shows that boutique/custom need not come with the heap of distortion as many others I have tested do. On that front, designer Rob Watts needs to be congratulated by not sacrificing measured performance for some unverified audiophile notion. "
RME ADI-2 DAC (Pro Audio pedigree):
"Finally a product where you pay more and you get more! "
“Kudos to RME for producing such an excellently engineered product.”
Benchmark DAC3 (John Siau designed and Pro Audio pedigree) :
" The Benchmark DAC3 as expected is a state-of-the-art digital to analog converter. Other than one set of noise spikes in jitter test, the rest of the measurements show exceptional performance. No glaring faults are seen at all. Its higher output level can be useful in room EQ applications to boot. So of course the DAC3 goes on my recommended list.
By the way, ASR measurements for Chord Qutest and Benchmark DAC3 correlate with Stereophile’s (both measured these DACs very favourably)…