ThePiratebay, putlocker, kickass torrent, and showbox are the best for downloading movies.
What, is Kickass torrent back? Can you PM me the official URL? If they're up again that's really big.
Oh OP, you can also try YTS movies. Their HD releases are of good quality and small size, although perfectionists around the internet have been flaming them a bit, mostly for their weird sound quality.