I have been reading this thread and wanted to respond. I am a physician and have participated in numerous double-blind studies. They are very difficult to do with integrity but I do agree they are the "gold standard" in objectivity in testing.
In the audiophile world, DBT is often more difficult (not impossible, so guys don't roast me on this) to do, since it is difficult for the tester and the administrator to both not know what the actual tested product is at the time of the test.
In my world, I can be the administrator and be unaware of whether I am providing a medication X or placebo. However it's difficult for me to not know what product (CDP, pre, amp, speaker, and even cables!, etc) I am setting up for my test subject.
I have done many single-blinded tests, and will overall admit that often my results show that my ability to objectively tell the difference (especially between similarly priced products) is not reliable. However, there have been times when my tests were significantly reproducible in MY environment.
Now, back to the purpose of this thread. I WANT to know people's subjective comparisons between the 5400 and other CDP/SACD players (especially via analog outs). I am NOT expecting objective DBTs and welcome personal perceptions. I find these valuable to me. I DO want to see more than " ...this is way better" comments. Please include how your comparison environment was set up, what you listened to, what your perceived differences specifically were in addition to your overall conclusions. Thanks in advance!