Are any of the newer DACs better than BB PCM63s?

Implementation fo course is very important,and actualy is the key to how well a DAC will untimately sound.I respectively disagree that the Crystal chips come any where close to what a 63k,or 1702k dac chip in cleanliness,and overall musicality .From talking to a highly repectited tech who is in the Arospace industry there are very few if any chips made today for the consumer that come close to the performance of those mentioned above.Another important factor is the power supply.As more and more of these are now made overseas,and the quality of most of them is questionable, also has a large bearing on the performance.This is why you see a glut of modders comming out of the wood work,taking stock pieces and bringing them to a more satisfying level.

Yes, that has been going on for quite a while (the mods). And one of (if not the) first things to be modded is the power supply. That and (in extreme mods) the replacement of part or all of what is usually a monolithic output stage with discrete components (sometimes even tubed).

But I'm curious, John. I happen to be a systems engineer in the defense industry (for quite a long time). I can agree in some respects that many commercial components just cannot be made to the tolerances expected for military use (too expensive). But among commercial devices, if it's one thing technology has shown us is that technology advances while cost either remains the same or goes down. Now I'm not saying that just because technology advances that something is "better". But your friend's comment is interesting: in what aspects of performance is his reference being made?

Quite simply noise is the biggest culprit in Audio particuraly digital.This is why a good many audiophiles still swear by vinyl even with all the clicks and pops.Most digital just does not sound musical,nor do any of the Hi rez formats other than some very few true DSD transfers.You are seing more and more maunfatcurers claiming to use military spec parts in their gear,and though the cost can be prohoibitve in some cases,there is plenty the the consumer maufacturers could use that is very inexpensive that is military grade and would imnprove gear by leaps and bounds ,but unfortunatly they are all ruled by the profit margin and very little money for R and D which is always the achiles heal in audio.