What's the 2107/627 designate? Is that an opamp?
I have the DAC Plus, lived with it for quite awhile in stock form ... then by removing the tube from the circuit. And now with DEXA's in all 4 positions. I have to say it's within a hair of as good as it gets with analog conversion ... and I do have a $5000 DAC in my mancave, the BMC DAC1. In stock form there were a few nits to pick, it could sound a tad etched at times and had an overall lean, very focused and defined, but lean presentation. Removing the tube from the circuit brought a bigger soundstage and a bit of smoothness, a nice step. But the DEXA's really added the refinement I was looking for, as well as a much fuller bottom couple octaves. Stand up bass and deep male vocals have significantly more weight and heft with the DEXA's ... and overall it feels more effortless and relaxed.
I still have the BMC DAC as my primary because of the way it integrated with the BMC amp, but just DAC vs. DAC the EE really makes a strong showing.