I watch around 5 movies a week (I am a movie buff).
I use Netflix. It's 3 day turn around, and I can have 3 at a time. So a new movie comes every day if I watch one every day. Or, if I want to watch it online at DVD quality, I can watch unlimited hours.
It cost me 18 bucks a month. That includes Blu-Ray, HD-DVD, DVD, Steaming, anything. It's by far the best service around.