I don't use either anymore, I have had comcast and my brother has Dish Network. I have had nothing but problems with Comcast and their customer service is terrible. Some places have a lot of luck with Comcast but they have a lot of crappy nodes and networks all over the country. If you live in a good one then you have good service, if you live in a bad one then your service is terrible.

My brother has never had any problems with Dish he uses it for both internet and TV. It won't hurt to investigate it, he got it through USDish Dish Network | Save $300! Call 1.877.401.6561 | DishNetwork Deals. Try giving them a call and see what they say.