Thanks for the confirmation. Yes, the S2100 is chock full o' quality parts and build. The S1000 is as well, albeit not to the same level. Too bad the DACs are quite long in the tooth.
I have looked at the Holo May; it gets many great reviews. I currently use the Gustard X26 Pro and find it quite impressive. The new X26 R2R is under consideration, having received a glowing review by SoundNews.