I don't own any Blu-ray movies, but my dad rented G.I. Joe - The Rise of Cobra and the new Star Trek movie. They both looked really good, and are great with surround sound. I'll have to buy some Blu-ray movies when I have more money.
The place we rent movies and games from has a really good deal. For "old" Blu-ray movies (basically anything before 2010, apparently) you can get them for 5 days for just $1. :iia: