Well, I now have the Toshiba 40ZF355DB TV and the Toshiba XDE500 DVD player, as well as the Xbox 360 and SKY+.
SKY+ is quite pixely but I was expecting that to a degree. Standard def image being all compressed from satellite and all that.
I tested The Dark Knight DVD on Xbox and DVD player. The scene where the Joker walks up to Batman on the road just after he crashed the podbike and then gets captured by Gordon.
Plenty of darks and low lighting (pretty much like the whole film

)
Xbox image was surprisingly good. Plenty of detail and the image was crisp.
The DVD player's image just seemed sharper overall. More definition on characters hair and the raindrops on the police car.
But you know, I don't have the trained eye of some of these reviewers. They say lots of stuff about details in the dark scenes, etc. I don't know if I'd ever notice this stuff. It all looks good to me
I do, however, notice the quality using the Xbox. The NXE dashboard is stunningly crisp. Text is now finally readable. I haven't played any games yet but I know they'll gorgeous.