I am a current Dish subscriber and have two of their dvrs (501 and 510). I am switching to DTV today. I am asking for your suggestions or reasons for choosing the r10 or r15, I am assuming I have the choice. I am going to get two of whichever model I get. I have never used either of the two receivers and my only dvr experienece is with Dish. I have read that there are places with the r15 sold out, if it is so bad why is there such a demand for it? guide me please!