I was wish D* for ten years but left for four months to AT&T Dish Homezone. It was awful. Been back with D* for a week and all is great. I've even noticed the SD channels look better on my 50" Samsung HD Plasma.
Be sure to read and watch the installers like a hawk. I had some problems like an ungrounded dish, not tied down cables, loose connections, and an installer helper that decided he would rewire my home theater his way. My HDMI didn't work which they blamed on the TV. The problem was they set the TV for 480p and 1080i. Unchecking 480p fixed that. I love "blame the customer" support.
If you have an HR20 do the IAMANEDGECUTTER back door and the remote will act more like TiVo. Buy the RC64RB remotes. About $25 each. They are backlit making life easier.
To set up your remotes go to the D* web site "how to" section. You can enter the brand and model of your equipment and it will look up the code for your stereo, TV, and DVD player. Much easier than trying several possibilities or launching a half-hour trial and error search.