I again have DirecTV and don't have a phone connection either. I live in the desert and DirecTV's reliability is much better than the local Time Warner service. Time Warner could never get some channels to work at my house. Also, at least compared to TW, the DirecTV DVR is much much better.

Having said all that, I still have TimeWarner's Internet service. I don't have a land line and therefore DSL is not cost effective. Satellite based Internet service is nominally fast but has a lag as the signal bounces between the satellite and the ground stations.

If an earthquake does move your antenna, moving it back is certainly doable. I installed my dish myself when I first had DirecTV. The receiver often has instructions for pointing the dish based on your zipcode.