When I bought my 52" plasma TV I shopped around allot, checking out many pictures in many showrooms.
I picked the samsung plasma because it looked so much letter than the others IMO.
I haven't experienced the motion problems you describe. Maybe it isn't a problem with my TV, maybe I'm not paying enough attention
But I can say one thing for sure, I do not like that my plasma gets very warm.
The room it's in is always a degree or two warmer than the rest of the house when the big TV is on for an extended period of time.
Wasn't like that before.
If I had to do it over again I'm not sure if I'd still get a plasma or not
I love the picture, I don't like the heat it gives off.