It would seem DAC
Only first hand long term experience will scratch that itch.
In case you missed it, THIS is about all I can contribute to your torment.
Thanks RG, interesting datapoint.
As I am sure you know, it is sometimes very difficult to judge the reliability of internet testimony, particularly from a couple of isolated posts. I have no reason to be more suspicious of mofuv's observations than anybody else's and I certainly mean him/her no disrespect, however I have seen so much in the 2-or-so years I have been reading the various boards:
As Bruce-from-Philly so rightly pointed out in one of his posts, many of the people who respond to a question posted on this type of forum (and Stereophile is definitely one of the better ones) have so obviously not understood it. In fact some appear to not even have read it. So as always, caveat lector.
However, there is also a wealth of informed opinion, interesting engineering insight and a monumental body of experience lurking out on these boards. If you have the ability (and time!) to sort the wheat from the chaff then it really is the biggest goldmine in the world.
Over many posts you develop a sense for who knows their stuff, listens for themselves and admits or keeps quiet when they don't know something. Sometimes, when a bond of respect and trust is established, it develops into a 'virtual friendship' with someone you have never met or even spoken to and about whom you may know nothing (sex, colour, face, class, etc.) That is why I have an anonymous handle, it is not that I am 'hiding', but why should anyone care who I am? Complete anonymity is a great leveller and this is about as close as you can get to judging someone by their actions alone. I have made a few of those friends along the way and I think it is one of the coolest things about the whole internet phenomenon.
Anyway, thanks again for the pointer! I am looking forward to finding the time to read up on upsampling and tossing my two cent's worth into your pot. I have a preshistoric degree in Electrical and Electronic Engineering and although we studied digital circuits (yes, they did exist) I did not study audio circuits in particular (not too many real-time applications at all in fact). I have enjoyed blowing out some cobwebs and reading up on jitter over the last few months but sampling theory, noise shaping, psycho-acoustics etc. are whole 'nother things. As a boss of mine used to say "A few years ago I finally realized how much I didn't know and started learning, been doing it ever since".