First let me state that my audio-visual knowledge is rooted in the era of 33-1/3 RPM LP records and videotape. I'm comfortable with a VHS recorder. CD's and DVD's blow my mind, but I've got a pretty good grasp on how to use the players and recorders.
Now I understand there's some newfangled thingie called a "DVR". Great. Uses a hard disk to record shows and skip commercials. Groovy.
Can I go to a store and buy a DVR and hook it up to my Comcast digital cable? Or do I need to pay a monthly fee to comcast? (Won't do it, cable bill is already over 130 bucks). Switch to Direct TV and get the service from them?
I guess the essence of my question is can I get satisfactory results installing a DVR inline with my cable, or do I need a subscription service?
Thanks!

