Asteroid-Man said:

Is WMV ok for a digital copy? And what size do most people go with for Digital Copies? I've got a 1.8GB WMV file for the Digital Copy - I'm rendering an MP4 though, so it can be played on a Mac and also because they are much smaller.

I might suggest an MKV... They are incredibly vivid HD files that fully support surround sound. The next choice would be MP4. Both are very good HD files to use for videophiles like ourselves. In my opinion, size isn't as important as quality; I'd much rather spend two days downloading something than two hours if it will look better.

WMV is kind of the brat of the pack, and I wouldn't typically let it wipe my unborn child's bum... but I am just not too keen on it. And AVI's are not the once splendid glory they once were...

Looks like I'm a bit late in my suggestion reply, but if you want to go back for the MKV, I would give it high marks on filmmaker's preference. I use Avidemux and Handbrake (both of which are freeware) to render them.