I have had all the interesting dacs and interfaces through my system- Audiophilleos, M2HiTech, Emperical Audio, Metrum Octave, Lavrey, etc and the EXA U2I with a Buff2 and tube output stage is in another leauge. And being able to upsample to 352.8Khz and 384Khz is a big plus imo. Even well recorded MP3 sounds a whole lot better when upsampled properly- I'm using PureMusic and Audirvana Plus and it is as good as I've heard.

I'm building 3 more units for friends as once you hear this it's hard to listen to anything else again.
And it's very refreshing to experience personal service in these days of computer generated replies to customer service. George's accent is a bit tricky to an Aussie, but he probably finds my accent even harder to understand, nevertheless he's been able to help me overcome a few set up niggles with relative ease.
The U2I is a sleeper- watch it become the reference standard when the audio world wakes up.

Posted by supra on diyaudio.com