We just got Dish Network about 2 months ago with every channel they have ( it was cheaper since we have 4 tvs) Two recievers are hd and the third is a dvr which functions as individual recievers for two tv's with two remotes. We only have one hd tv which is in the family room and works pretty nicely as far as quality goes, but is only HD when the channel is broadcast in HD. So you are not going to have the best quality on all channels. I would say on only about 10-20 channels, mainly the movie ones.
The DVR is Phenomenal. You can pause live tv. Rewind it, Play it, then rewind it again for those scenes where you just can't make out what they said. You can also schedule to record shows which are on at bizarre times.
Honestly, even though HD quality is nice when available, I am not sure it is really worth getting when compared to DVR.
As far as signal loss, I believe we have only lost it once and it was during a really really bad rainstorm. But we did have signal for the hurricanes, which again is bizarre.
Reason we chose satellite instead of cable, well, looking at the roof tops of the 20 or so town homes in my community, everyone has satellite dish. We asked why, and apparently the cable reception goes out more than with satellite which is odd since these town homes are about 2 years old.
Hope this helps.
Andrew
BTW, snooping around the different things on the satellite reciever, I found a couple of channels for Karaoke. Really weird!