I recently signed up for ComCast (I know, I know.... ).
The issue for me, though, is that while OTA is great in terms of audio and video quality, it's very spotty in both choices for programming and the quality of the signal I'm able to receive. Nothing's more frustrating than to see a QB release a long pass, and then just have the picture and audio vanish mid-play.
So, given the cable providers in my area, the volume of programming, and other issues (okay, price), I opted for ComCast. For me, they had the best price, the most HD programming (granted there's a compromise there), the best phone service, and the best (highest) internet speed.
It'd be nice to be a purist and demand only the highest quality, but let's face it, the rest of the family has to be able to use the television too.
Um, and it is only television.