Thank you for your reply. It was really bugging me because my wife also noticed it right off the bat and she normally cant tell the differance between SD and HD on some channels lol. So I took it off the wall, lugged it back down to the store, swapped it for a new one, went out to eat, got home and hooked up the new one...phew. And thank goodness I had a defective tv!!!! The new one looks great so far, I only got to watch it for a few minutes and now it is way past nite nite time (new job in the morning). I didnt see the white blotches that I saw on the other one. I do see what your saying about it being more of a dark grey than a black. I can live with that as long as it was uniform. The blotches on the first set where always in the same spots and pretty large. Ill watch some more tv tomorrow after work and see what I see. If anything changes Ill post it here.
Oh, and looking at the back of the TV I didnt see woofers like the 750 had. Ill listen close to it while it is playing and see if I can find any hidden speakers somewhere that is not obvious. And the light everyone was asking about has setting for always on, only in standby, and only while playing. The melody (sound it makes when turning set on and off) has low, med, high, and off settings as well. Hopes this helps, if anyone has any other questions Ill be happy to post them. I have had 3 different series Samsungs, always changing when something better comes out. Its nice to work at a retail store sometimes hehe.