Finally gave a 506XDE a thorough going over yesterday. Here are my first thoughts: 1. Black Level - a big disappointment. In complete dark, a black screen still emits a quite bright glowing greeny-grey just like the old screens do. So where it counts, there is no subjective improvement. Bright images superimposed on a black background do give the illusion of quite a deep black, however. The big advance is with the lights up - the blacks certainly do look a darker shade of grey than they used to. 2. The judder is still there. Ruined an otherwise perfect HD picture of various sports. 3. Pixellation on movement - much improved! Perfectly clean, but with the sharpness intact. The picture looks a tiny bit less grainy also, and the colours and richness seem to be better, perhaps due to the objectively lower black. These are very subtle improvements though. All in all, congratulations must be given to Pioneer's marketing department. If I didn't know it, I'd have thought this was the 505, so small are any differences. Sources were Arcam HDMI DVD, High-def demo, and integrated Freeview.