well...what i care about is not seeing blocks during the motion phase. I am hoping that plasmas will do decent job because i really do like the motion flow.
If you're seeing blocking during high motion, the source is likely at fault, and no display is going to fix that.
What are you watching when you see these blocks? If it's cable, then you're out of luck. Some DVDs also show macro blocking, but to a lesser extent. Blu-ray is thankfully block-free (except for a few rare, poorly encoded titles).