oh yeah, they have cheaper options. I thought they had a free trial, you should try it. When you search for amovie, itll say dvd and bluray. You also have to setup your account preferences for blu-ray, so that it defaults to hd instead of sd when you add a movie to your queue.
2 movies at a time unlimited is $13.99 on Net Flix. That may seem expensive until you realize that Blockbuster charges $5 a pop for a BD rental. You watch 3 movies a month and it has paid for itself. I have no issues getting my BD discs via Net Flix, I have gotten 3 BD movies the day following release on Net Flix. Never had an issue.
Blockbuster is another good option for about the same prices. I only do one out at a time, since my GF has Netflix, for $8.99. If there is a BD-carrying Blockbuster in your area, for a few dollars more you can exchange in-store for a BD movie off the shelf. When I did that, I got unlimited 1-at-time via mail plus two in-store per month for $13/mo.
I'd much rather rent because most movies I only watch once before they start running them over-and-over on HBO, or later, regular TV.