Another way to avoid rain fade is to install a larger dish. I have not seen a larger version of the DISH 500 system, but you can point 2 dishes, one at 110, and one at 119. A 24" dish is supposed to cut 80% of rain fade.
You can go up to almost any size dish, but probably do not get much more return once you pass 35 inches. The way my roof line goes, you cannot see the dishes, so I went with larger dishes each pointing to individual satellites 61.5, 110, 119. I went ahead and went overkill with 35" dishes (they run about $45) since I was not going to buy small ones and then be dissatisfied and have to change them again.
I live in an area that has a tons of thunderstorms and was tired of having the boxes lock up because of rain.
Note: It takes a 64 switch and individual LNBs, so it is cheaper to have it done this way the first time you install because they use funky dual lnbfs that are useless for multidishes (not to mention SW 21).