It is certainly better than anything that I have heard to date. For once I am actually quite content, now if they would only release folder browsing, speed up the scan time and fix a few other small things.
What phones will you be using? What file formats will you be listening to? The 720 is great however will hiss with sensitive iems. I have never heard the 901 however the micro sounds great as well. Calyx will be coming out with a new dac/amp soon, the Calyx F.