Basic Cable about $40 bucks a month give or take if you have cable internet as well. The HD box is like $7 bucks a month here, the DVR one is 15 bucks.
You get all the broadcast stations in HD, and PBS. You wont get INHD or DiscoverHD, so it might be worth it to move up to one of the better packages if you like that sorta thing.
Also note they usually have at least one FREE HD on-Demand movie every couple of months. Right now you can get On-Demand FIFTH ELEMENT in HD for free.....
however, a word about HD over cable: Compression is everywhere. HBO was the least compressed of all the signals, but the rest of the channels WILL macroblock on you on fast motion. At least they all do in my area.
Paying for movie channels in HD is a waste when they macroblock like crazy.
Showtime was the first channel to have "RETURN OF THE KING" in HD, and within 10 minutes it had macroblocked so many times I shut it off and cancelled pay services the next day.