PICTURE: I prefer whichever flavor of ProRes or DNxHD/HR quicktime .mov you mastered your movie in. If you finished in 4K or 2K, I want that. Movies delivered in 1080p HD will require a mild blow-up to 2K. Bottom line, the best source would be a ProRes file with the audio built into it for the sake of sync.
AUDIO: A six-channel 5.1 mix is preferred but stereo will suffice. Audio should be embedded in the QuickTime file with picture or delivered as individual mono WAVs that match picture length exactly. Audio should be 24 bit, 48kHz and laid out as follows: L R C LFE Ls Rs.
Any questions, just let me know!