Well if your anything like me and a lot of other HD tv owners that couldn't wait to jump on the hd train, next few days I will be seeing your thread on how great the tv is, how great hd looks, and how sh1tty any other channel but hd is, and can no longer stand to watch your favorite shows.
I was so excited to go hd, got it, put on the hd channels and was drooling in amazement at how great it looked, then I watched a sd channel, all washed out, looked like it was drawn in the set by a child with water colors and could only paint in blocky colors at that.
I hope your tv does a better job at producing SD images then my Olivia 32" LCD did, or my Toshiba 65" crt did, or it is going to be a total let down till they all get their heads from their asses and make it all hd, or something, so you get full use from a HD set. Sorry to be a buzz kill, just seeing your excitement reminded me  of me, and couldnt wait for my tv to show up, and then wham, was I so ever disappointed, 15 hd channels, and 100+ sd ones, and could not stand to watch anything on sd anymore for it looked so damn bad.