I agree with most of these points. But i would like to share a few comments about what ive noticed about sound cards. I believe that its not so much the converters and the sound quality. Most sound cards in any given price range sound about the same, or different but almost unidentifiable differences. I think alot more of the problem i see later is the companys driver support, and compatibility support. Like with the Delta series cards. I cant remember how many time i have heard "Help! Pops and clicks with my delta card!" I am also a victim of these pops and clicks. This pops mainly come from incompatible motherboards (VIA for example) or really crappy drivers. As you delta users might have noticed, the only stable drivers are drivers from almost a year ago. All of there knew ones have loads of problems. Also, there is also OS incompatibility. Delta cards have been pretty good on this part but i have heard of other cards having problems with new OS drivers.
In conclusion, i am having problems with my delta cards. I am trying to run 2 and to let everyone know, it doesnt work. It is impossible to not to have pops and clicks or some sort of syncronizing problems. BTW they are two delta 44s. Even though they say they can do it just fine, they cant. I take one card out, not a single problem on any OS, and i can get it to 1 MS latency without any problem. But as soon as the second card goes in, hell breaks loose.
So my opinion is that its not really the converters and noise floor you should be watching for, but things like compatibility, drivers, etc. Even MOTU has problems when trying to use it with PCs.
Darnold