I have a HDTV got it 4 years ago. Purchased the largest antenna Radio Shack had, that would fit in my attic, which was there largest. Have recieved all channels since. Use good cable to the TV. And make sure the connections are good and tight.
There is not a lot of True HDTV being transmitted. All the stations are requierd by law to be transmitting on HDTV channels as of last year. But may a time the standard signal is upgraded to HDTV. It is not a true High definition signal. Once you see A true HDTV recorded show, you will know the difference.

We actually don't watch a lot of HDTV. Some games and everyonce in a while we do. I bought it because HDTV was coming and since I wanted a 60 screen for movies. I liked getting ready for it. Plus with the line doubler the the movies look nicer.

Dave

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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car