I asked you earlier if you still had the hissing / popping that you mentioned earlier, but you never responded .. I'm assuming it has somehow disappeared now since it sounds like you want to keep the unit.
You know one thing I noticed between the two sets. The ZT sometimes had this green tint in gradient areas such as a person's face where the lighter cheek area transitioned to the darker area of the side of the face.
I don't notice it on the F8500. Not sure why...
Thumbs up to Samsung customer support. I called them and told them the touchpad on my remote felt ever so slightly loose when I slid my finger across it. I know because I've used about 4 other same remotes recently.
They mailed me out a replacement without much pain.