I need advice on Directv and the receiver options available. I am very new to the use of Directv equipment having moved in with my dad who has been a user since 2001. He is 88 y/o and has no idea about equipment, only that it should function and be simple to use. Current equipment in use: H23-600 (main room), DSX-5500 (bedroom) I wish to get him some new options within Directv like On Demand which requires a DVR but which DVR to get? His entertainment requirements are simple, movie selections with no interuptions and a simple to use format. I doubt he would use the 'record' feature or some of the other advertised feature mentioned on the Directv website. I had contemplated getting him a Roku with Netflix as the movie selection there seems to be quite extensive but perhaps On Demand is just as good? I'd like to call Directv for options but first I'd like to educate myself by getting some suggestions from real people who use these systmes. I hope some of you can help give me guidance.