Thank you all for your responses thus far. As for system synergy, let me say that I am not just talking about my current set of separates, my opinions stem from trying a lot of DACs, preamps, amps etc. and I am tired of it. Now room acoustics is the one aspect I have ignored and being recently divorced, well I don't have much by the way of plush furniture. I will work on that aspect and I am sure it will help reduce fatigue to some extent. In my collection, 1 out 6 recordings are tolerable where the massed strings are etchy but "listenable". Only a handful are silky smooth and if even 1 or 2 sound great, it stands to reason that your equipment has the potential to resolve complex music. In fact, I have been happy with how most other instruments sound as well as the imaging, sound staging, vocals etc, on various equipment. I recently had a Cal Sigma tube dac driving an AVA hybrid pre and thought the tubes rolled off the highs but the strings still felt rough just not as prominently. To eliminate the possibility that it could be my sensitive hearing, I will buy the titles mentioned above and see where I stand. If someone here has heard the new hybrid sacd LSO live release of Brahms 4/Haitink, I would like to know your opinion. I was surprised at how etchy and unnatural the strings sounded even on sacd layer. I hope I am not the only one who thinks that!
Anyway, Brownsfan, I kinda thought I'd give the non-OS DACs a try so I bought the Poth Audio equivalent to the Audio Mirror to experiment. I have maybe 20 hours on it and a ordinary coax cable so I can't critically evaluate it yet but so far it added punch, cleaner midrange but can't say that it smoothed out the highs. That maybe because of the coax cable though, I have a better one coming so hopefully I can get rid of some jitter otherwise I just want to step back for a bit, enjoy College football for a while and then focus on getting back to LPs.
Cheers!