I was wondering if anyone out there in HTF Land had Comcast HDTV. If so, is it decent? Also, I assume they give you some sort of HD Box. Do you have to have the box even if you already have a TV with HD Tuner built into it? I would call and ask Comcast all of these questions but I wanted to get an idea from a better source and not a big sales pitch if you know what I mean. One last thing....are those HDTV Antenna's worth the money? How many channels can you pick up with them? Thanks a bunch, DF P.S. What channels come in HD with Comcast? I am aware that it could vary Thanks again!!!