Thanks for the info. Pioneer does have indeed some very good screens (especially the new Kuro series) But I made the decision to buy the Panasonic 42-THPZ700 which I still didn't regret! Especially with my new HD receiver this really rocks. The picture quality is excellent (also with dark scenes) for example BBC HD really looks excellent, very sharp & detailed.
The upscaling is indeed not the best, but luckily I have most of my movies in 1080p quality