Riaa, just to follow-up on source quality, for a moment so as not to hijack thread, for decades like most people I just accepted LP and CD differences, sometimes one better than the other. But it took hearing various pressings of the same LP to understand how much better one could be than another. So I realized that was the case with CDs. Oh well, I already had mass quantities of each and wasn't going to obsess over replacing or analyzing each. good enough would have to be good enough. same with systems. But back to George's point, and others', there is now the business opp for someone to go root out the various DR ranges among versions, and offer that to us. I'd pay a serious premium for uncompressed, or less mixes that exist, if they do anywhere anymore. That might justify me buying better gear. Meanwhile this probably answers my wonderment that about 50 jazz albums played to a high-end DAT 20 or more years ago (I work in film/tv so long ago we had very expensive A-D converters, for the time) sound fantastic to me. I either have to replace CDs as you suggest, search databases, or forgot i ever joined this thread, and chalk up to an anxiety dream. Thanks.