I'm very familiar w/ torrents but haven't found any good sites that share .iso's of legally downloadable movies such as big buck bunny etc.. All the sites I frequent provide .mp4, .avi, .mov etc.
I want to find a site that has torrents w/ the .iso's of movies instead so I can burn them directly to a DVD instead of converting using software such ConvertXtoDVD. I don't like beating on my computer for no reason.

Additional:
I d/l the movies and add them to my media center. This isn't for things like this. It's so I can burn DVD's for my gf so she can watch stuff at her place. She's not tech savvy and only wants DVD's instead of me setting up a media center at her place.

Thanks for all your help!
I have a netflix account. But she lives out in the country and her ISP is garbage. Even if you throttle the bandwidth, it's still VERY laggy. So this won't work.