I used to watch my kvcd's on my cheap Finlux 510, which appears to be the same player as the Cyberhome 2400 (
see here).
Then I looked at some of the same movies on a Sony at my girlfriend's place and I was amazed at the difference in quality: where dark areas were blocky on the Finlux, they were smooth on the Sony.
I believe it has to do with the Block Noise Reduction of the Sony, or just a better videochip.
I decided to buy a Sony myself (NS-405 for €229) and the quality improved drastically. They still look a bit better on the Sony of my girlfiend, but that's probably because she also has a Sony 100 Mhz Digital Scan TV, I have a much cheaper Samsung.
So my advise is to look at a movie with night scenes on different kind of players and pay a bit more if you experience the same visual differences.
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