Newbie here. After 2 months of installation insanity, I am seeing HD TV! I have been exploring these boards and read quite a bit about the HR20-100 and HR20-700. I am pretty sure I have the 100. I read the thread that (sort of) explains the differences between the two. Is there any pressing reason I should try to get DirecTV to swap out my boxes? Based on the info here, I can't tell? Thanks!!