Which seems to be more reliable in rain/storms? I have had DTV, and my parents still do. Even in somewhat hard rain (not a storm), we would lose signal. It's kind of a pain. Uverse's PQ is not as great as Direct, but I'm enjoying having no issues with a signal in the few days it's rained in the past month.
Assuming the dish is aligned properly, you should rarely lose signal, only in the worst storms. Dish or DTV.