I was looking at the Panasonic 42" Plasma EDTV Model # TH-42PD50U.

What's the difference between a tv that is HD and one that is EDTV?
I saw a Panasonic 42 inch EDTV in person and could'nt get over the sharpness and clarity of the picture and it had a great price and an ATSC tuner built in.Even had HDMI and component cable hook up.
Is EDTV good? I was told it has a life of 60,000 hours..just like an LCD HDTV !