It's kind of hard to come by on DVD, but there is a melodramatic silent film by F.W. Murnau (Nosferatu guy for most) called Sunrise (
http://www.imdb.com/title/tt0018455/) which I think is a particularly powerful little movie.
The story is both horrifying and inspiring at the same time, it revolves around a man and wife who've drifted out of love. The husband has a mistress from the city who convinces him to murder his wife and marry her, and so the first half of the film follows the husband as he plans to murder his wife, and it builds up to one of the most suspenseful scenes I think I've ever seen. The second half is one of the most inspiring things ever as the husband and wife fall back in love after the husbands failed murder attempt.
The film is really amazing, particularly the second half when that expressionistic touch really kicks in and shows what I guess could be called the feeling of being in love just personified on the screen. There is a shot where the couple walks through the city and it dissolves into this surreal landscape, sort of showing you what it feels like for the couple, then back to the city where they've caused this traffic jam because they're so oblivious to anything around them.
It's just great. I'd recommend maybe trying to get it on Netflix, if they have it.