Ok, I moved from channel 71 to 23 with no improvement. I checked my connections and found no problems. I connected the tv2 via composite instead of rg6 and saw significant improvement. I contacted Dish about running composite if I supplied wall plates/cable etc, and they said only for $100.00. It bothers me that I upgraded equipment only to lose picture quality. I recommend that future 942 customers purchase their own composite wall plates and cables for Dish to use in TV2 install if not using the RG6 that came with the house. That way you get better connections with no additional install cost.
BTW, would the people who are connected via RG6 who say they have a good picture get an even better picture via composite? For example, my wife never complained about the RG6 picture. I'm thinking I might be a little pickier about picture quality.