The main question is whether he wants your help or not.
If he lives locally, and you can pick it up, and then set up the wiring (the most difficult part) then going with any brand is fine. Most remotes allow you to just press a button and the video is on screen. Get a separates setup that includes a receiver that converts everything to component video, then hook up DVD & cable to it via component and set the TV on component. Add a Harmony remote and everything works off a single button press, nice and easy.
My philosophy is simple: Give me a budget, let me decide. If you aren't going to listen to me and don't care about learning, then let me decide or go buy something and live with it. Definitely don't complain if you come over to my home and my $800.00 setup blows away your $2,000 setup.
If you are willing to help, ask for a budget and then say 'This is what I would get, let's go buy it, I'll set it up for you'
If he is insistent on throwing money away, let him.