Why should I stay with Dish Network and not go with Comcast?

Comcast High Speed Internet Rocks! The best in my opinion. But only if you can get it for $30/ month.
I was paying over 50 bucks a month, and decided to quit. I did not want cable TV just to lower internet charges. So they offered me HSI at $29.99 a month provided I signed up for a year. I did, and never looked back! I am averaging 3.9 mb downloads, and 347K uploads.