Harmy said:

@DVD-BOY: Thank you but that didn't answer my question at all. I understand that the size won't always be exactly the same but what is the average size of a 5.1 DTS-HD track? And how big will the stereo tracks be in whatever lossless format is the best for those. I have zero knowledge of this stuff and I'd just like to know the approximate numbers.

I think Jan best sums it up:

Jan said:

I've seen 5.1 DTS-HD MA tracks varying in size from like 1.5 GB to more than 4 GB for 2 hour movies.

If it is of any help, I took the 5.1 from Dark Jedi's v3 DVD Project, decoded back to wavs and transcoded to DTS-HD MA.

The file came in at 3.25 GB. Average looks like about 3.7Mbps, Peak 4.7Mbps. 1.5Mbps Core.