Same here. I just subscribed to Blueridge Digital Cable and the HD is much better then Dish. Not as many channels (no voom) but I would rather have true HD with less channels then HD lite . I may be selling my 622 soon !
Comcast in Sacramento is second to worst (there are some bay area systems with even fewer channels!) when it comes to the HDTV lineup. As of today, Comcast Sacramento has ESPN-HD, InHD1, and DiscoveryHD. All of the premiums (Sho, HBO, MAX, STARZ), plus 5 locals.
I don't sub to premiums unless there's a program I'm interested in (HBO for Sopranos mainly), so that's not a major selling point. So, 3 national HD channels, that's it. With my 622, I receive all HD locals via antenna, so those are passed through at full quality, Discovery HD and ESPN are passed through at full quality, so that leaves InHD1. So many repeats on that channel that it's not a major issue for me.
So I increase with many other, granted not full-bandwidth, channels that I can't otherwise get. The PVR from Comcast, while not terrible, is a lot worse off than the 622, so there's another plus for E*.
Once we get the RSNs and InHD1 via E*, the playing field is completely leveled, and there's no real reason to consider Comcast again.