I have comcast also, TV with all HD channels, HBO, Starz, Cinemax, internet and a phone line that I don't use. I pay 130 a month. I don't mind calling to get it reduced every 6m, its only 2 calls a year and it never takes longer than 10min. 20m of my time each year is surely worth the $500-$600 I save each year doing it.
I would pay more for comcast too. I love getting all the Duck and Blazer games in HD.