@samureyex +1, I have the UltraDac and have been enjoying it alot for about 2 years. Everytime I time I think about ’upgrading’ it, I conclude that any difference in sq will be too slight or subjectively different to make it worth while; meaning, I really like the UltraDac.
Ohh, and I obsessed for about a week before I got it and still do with this that or the other possible tweak. Besides the other stuff I did, I found that an etherregen, silver XLR’s and a Zafino PC substantially improved imaging, soundstage and bloom (which for me happens when micro resonances are abundant and believable).