DAC with ESS Sabre chip, volume, XLR+RCA simult.

Yes, it is brilliant little device. Are you sure it supports -simultaneously - XLR and RCA outputs?
What about digital volume control?

Audiobb, yes it has been confirmed by Larry Ho, chief designer at DaVinci Audio, that the Geek Pulse X will output RCA/XLR at the same time.

All the Geek Pulse range will have a 128 step digital volume control, operating via a knob on the front, or via the IR port which supports the Apple Remote (sold separately).

It seems like it could be a great product. I have one ordered with the upgraded Femto clocks and the external linear power supply option.

Thank you everybody for your responses. In the meantime, I have built a DAC based on dual Buffallo IIIs from Twisted Pear.
I have had a lot of help from my friend Siniša, and also a lot (A LOT!) of help from mr. Robert from Netherlands. He programmed Arduino controller, my friend Siniša built everything from there.
The DAC is amazing, realistic and holographic.
The sound is very neutral, but on the neutral and detailed side, not on the warm-smooth-rich side of neutral

Live music is warm, smooth, rich  sounding,  I  just listened to live sax and piano Sunday!, everyone needs to listen to live music every week,  that way they get their system closer to real music.