Capturing from DVRs and Cable Boxes

I’ve been wondering what the best way to go about this would be for a while now, But since I’ve been checking out the forums my interest was sparked again basically I want to capture HD recordings and movies on demand like from starz and HBO for burning to blu ray or avchd discs, mostly for movies never released on blu ray or for Open Matte presentations, my question what would be an affordable but good way to do this like what equipment and software would get the job done decently

There’s a long thread on the subject here:
http://originaltrilogy.com/topic/How-to-capture-HDCP-encrypted-HDMI-sources-Vudu-Netflix-Directv-Virgin-Media-etc/id/15179/