One note you might consider (as it has been discussed in other threads) is that even though there are 3 channels on the TP, it is variable rate for the channels... so, if both Showtime-HD and ESPN-HD are showing SD upconverts, then there is more bandwith for Discovery-HD.... so, the next time you see a bad picture, you might check and see what is on those other 2 channels to see if its a true HD program taking up more bandwith.