Which Universal DVD has the best CD Transport?

I've seen this question phrased in several different ways, but want to focus specifically on the CD Redbook transport quality in universal players. Like others, I'm exploring the possiblility of combining a good DAC with the best CD transport in a DVD universal machine that I can find. I've read the other posts and have learned a lot... thanks all; however, I'm still hoping for clarification on what A-Goners feel is the best sounding universal CD transport (realizing DVD universals do not compete with separates or high quality CDPs). Some universals (DVD-A optional) come to mind.
Sony 9000ES & 999ES, Pioneer DV-47Ai, Integra 8.3, Marantz and so on. Is there a solid difference or are they all pretty much the same?
Any comments or opinions will be greatly appreciated. Thanks a million, Jim