Question about Lossless Rendering in AE (PNG not found, can Premier Pro read this "lossless" export?

Question

Hello,
I want to compose short transitions (45 seconds) in AE CS6 incorporating 3D graphics and also a short intro (30 seconds) containing some streaming video clips assembled in a 3d space as well.
My deliverable will ulitmately be in Blu-Ray format and I need excellent quality.  I have zero concerns about the amount of time it takes to render; I only care about ultimate video quality in my deliverables.
My NLE is Premiere Pro CS6.  I'm working with some beautiful Canon 5D images on a 2008 MacPro tower.  I only photograph the day after it rains so I can always get pristine shots.
What is the best possible workflow for me, given my reliance on AE and PrPro and Canon 5D images and .mov files?
Earlier, Rick suggested exporting in PNG compressed format, QT.  But I don't see that in my render options, although the Lossless option at the top certainly looks appealing.  Can PrPro read that type of export?
Am I doomed to vaguely average quality in Blu-Ray format or is it possible to have a really nice "wow" factor using this workflow?
I'm going to purchase a new X.264 encoder when the Apple version is released this month.
Does that make any difference in how my final results from AE will appear?
If I need to abandon this whole 3d motion graphics enterprise because AE and PrPro, working together, are only capable of vaguely average deliverables with respect to 3D motion graphics, then so be it.
I would prefer to cut my losses now.
What are your candid thoughts?
Thanks,

Answer 1

Thanks fellas!
One two minute video and one photographic screen shot is worth 10,000 words.
Ben, do you recommend purchasing QuickTime 7 Pro for that PNG render workflow?
Also, a friend of mine recommended the following workflow.  Any comments?  Constructing my own custom timeline sounds like a bit of a chore.... perhaps it is worth it?  He's worked quite a bit in large studios and does not recommend PNG here.  Not sure why.
Matt
My friend recommended:
"I still recommend ProRes for Adobe, and most of the bigger shops that I've heard of that use Premiere still convert to Prores. Cineform or DNxHD would work just as well, depending on your workflow. You can create a custom timeline that will let you work and render full-res files for those editing codecs, instead of the default low-res mpeg2 that Adobe is set to work with.
Working with H.264 is still much more processor-intensive than many systems are prepared for, and in the ProRes conversion process hopefully you're adding reel and TC info if you don't already have it (I'm betting you don't).
Really it's a question of knowing and taking control of what is happening to your video files, or just letting your system do what it wants, which often isn't what's best.
As far as final conversion... I use Mpeg-4 in an mp4 container to avoid the gamma shifts that i see too often in h.264 .mov files. As much as I love the idea of open source, it's not always practical for professionals. X.264 may be fully compatible, but I haven't had reason to work with it instead of .mp4 files. Given the choice of h.264 vs x.264, I would definitely test out x.264, as I've read that you can avoid gamma issues by using it as well."