Thing is Ferox, you can get a perfectly good rip of a 90 minute movie in 700MB, so a 30minute movie (like Aftermath) would warrant a third of that filesize and still be good quality.
Roughly 90minutes @ 700MB = 7.78MB per minute
30minutes x 7.78Mb = 233.33MB
So a file size of 250MB would have been more than adequate for Aftermath, which is what Spud's getting at.
The borders is a different story, waste of bitrate encoding black areas of the screen etc. as has been said in many different threads.