Again, I didn't hear any digital amps in the class of ARC Reference tube gear, but I was impressed with the Kii Audio speakers that are active and have digital amplification. In fact, they were hooked up to a Kronus turntable and had to go through an ADC conversion and still sounded good.
There's no doubt that many people can be perfectly happy with that sound. However, the Kronus TT setup is so good that it's tough to say if that wasn't carrying the SQ more than anything else.
Genesis had a more than decent sounding digital amp to go with their speakers. Not sure why they don't get more 'pub' from the digital amp fans.
Nevertheless, at the end of the day, I wasn't lusting over anything and was more than happy to get back home to ARC tubes. It's still a night and day proposition to me right now, but I'll keep looking/listening.
The one thing relevant to this thread's "best DAC" theme could be the new LH Labs Vi DAC. I didn't hear it, but it won an award (although those awards are largely meaningless). It did look promising. The option to choose either a SS or tube output stage seemed interesting, but that's assuming they do it right. (Shanling did that at one time with their SACD player, but both options sounded awful.)
As for servers, I can't see how it's possible for someone to like a MacMini over the Antipodes which is clearly the best I've heard, but I guess anything is possible. I think it just shows people have different tastes and it's best not to take advice from forums unless you know that person shares your same preferences. Otherwise, you could be destined for disappointment.