I had read that the Panasonic 42PD3-P was the best 42" plasma monitor, despite it's lower pixel count than the "true-HD" models. When I viewed it side by side with the more expensive 42PHD4P, by Panasonic, I was convinced. It clearly outperformed this HD model in brightness, contrast and overall PQ with both SD and HD sources.
Then, I saw the Pioneer 4330 (mostly the same components as the 433 CMX,) and the Panasonics side by side at Tweeter. Everyone in my group saw the same thing: The Pioneer had a considerably more detailed picture and was brighter overall than the Panasonic 42PD3-P. The Panny's blacks were slightly deeper, but the advantage narrowed when we set the Pioneer black level to high.
Using SD sources, both brands suffered compared to HD. I could not see any significant difference between the 4330 and the 42PD3P.
Since then, I've learned that the 433CMX is superior in PQ to the 4330; has a video card slot that provides for future upgradability, and costs a lot less. From what I can see, with the video card, it is a Pioneer Elite (minus the wide bezel,) for a whole lot less money.
Contest over. I'm getting a 433CMX.