i have a hr10-250. I just got off the phone with dtv and was told this unit is not compatible with the new dtv mp4 hd format. basically i'll never get more than the 15 channels initially offered. to get the 100 channels dtv now offers i have to change the box and a cost of 300$ !!!! AND lose my tivo functionality. I see these things for sale all over the internet and it bothers me. these units are useless. Any idea why nobody is mentioning that and why these boxes are still being sold. I just saw one for 1100$. I'm upset that i spent 700 on something that's useless and am seriously considering cancelling my dtv subscription entirely. ive been with dtv for 13 years. I'm tired of buying equipment. maybe cable is the way to go. what do you thing?