I think RCN is cheaper than AT&T, especially if you get a package. We've got the "bronze" package which includes local phone; there's a package for cable TV too.

I think RCN and AT&T are your only choices, tho.

As dykeprincess mentioned above, AT&T tech support sucks ass, while RCN tech support is not only tres helpful, but very very friendly and have always gone above and beyond. Of course, what'd be even cooler is not needing tech support, but what do you expect with only 2 companies in town to choose from.