You might consider asking about switching to Comcast Business. Again, a lot will probably depend upon who you get, and how you present your case, but you might get yourself a better deal doing that. It doesn't hurt to try at least. One thing with business is that you'll be signing a contract for probably 2 years, but it also locks in your price for at least that long, and it isn't a prohibitive agreement in the sense that if you move to somewhere that doesn't have Comcast, they aren't going to fuck you over. The lady I worked with pretty much bent over backwards to get me the best deal she could (like HBO for $5 a month for a year, etc.), and for a couple of years it was great. Eventually things started to creep up again, but she always got me the lowest she could at the time if I called. Finally I just cancelled TV altogether for various other reasons, but I still have the internet/phone and have no complaints.
The other benefit to Business Class is that it has no bandwidth cap, so you can download the entire internet each month and they don't give a shit. That's the main reason I decided to eventually cancel the TV part.