The deciding factor between DTV and Dish for me was the HR20 (DTV’s HD DVR) was buggy as hell at the time I was buying. There was talk on the forums of some wonder software revision that was supposed to make it all better, but after living with Adelphia’s POS box for 2 years I wanted something that was proven in the field. Couldn’t be happier with my 622.
I believe the software update for the HR20 was pushed down, not sure if it was the wonder fix or not. I haven’t kept up on the news since I really don’t care about the HR20.