Movie Download
This may be a silly question but here goes. Most of the movies available for download are between 600 and 800 MB for a 2 hour film. On a DVD that would be 3 - 4 GB. I know they may be compressed but is this full DVD quality? It's hard to tell on my crappy laptop screen what quality they are but they seem a little fuzzy. Is there a particular file varient which is most likely to yield higher quality? Secondly how come there are so many versions of films with chinese/japanese subtitles and how can they be avoided? Thanks,
Niall.

p.s. One other thing - when I start to burn DVDs will these downloads support surround sound on my home theatre system just as a normal DVD would?