Motion wise I find it depends heavily on the content. I had a Panny plasma and my current Sony LED at the same time and was outputting content to both to do direct a/b comparisons. 60fps content was better on the plasma. Not massively, but better. 30fps was considerably nicer on the eye with the LED, tho, and a bit of a jerky mess on the plasma. I'd owned two panny plasmas prior to this and they had the same issue. Seeing as I console game a great deal these days and more often than not games run at 30fps, this was a big deal. Movie wise there wasn't much in it, with the plasma slightly edging infront. Add phosphor lag - which I see clearly and regard as the worst video nasty of them all, and by some margin! - and the LED came out on top. The plasma went back to the shop and my W905 is still going strong.
There were other factors in play too - input lag (the Sony LED was noticeably more responsive), no worry about retention, image sharpness and handling direct sunlight etc.