I've got my KF-42SX300 set up now, and here are my impressions:
Picture quality: DVD's are excellent in some scenes, and really ropey in others. I've posted a seperate thread to see if someone can advise me if the image should be better. PS2 quality is excellent, though playing PS2 on a 42" screen shows up how rubbish PS2 graphics are on some games, and VGA is excellent. Can run in 800x600, 1024x768 or 1360x768 (although the latter has problems due to the screen offset being wrong, causing the left hand side of the screen to be missing - something i could probably fix if i knew how to get into the service menu) There is a bit of ghosting but this is 100% due to a rubbish vga splitter box i borrowed from work, shame it'll cost nigh on £100 to get a decent vga splitter and vga cables..
Design: I really like the look of this set. The silver/grey and black offset each other nicely and it's a really nice focal point for my room. One small gripe is that the TV has a light on it even when it's powered off, unless you totally unplug it.
The "grey" factor: OK this pisses me off, at the moment it's ruining my movie viewing experience cos every time there's a scene with darkness in it, all i can think about it how bloody grey it is, but hopefully after a few weeks/months i'll stop noticing it. Heck if my parents can stop noticing that the black on their TV is actually green, i can stop noticing it being grey.. If not, i'll have to resort to finding some polarized plastic to stick over the screen..
Features: The menu on the TV is a bit lacking in some areas, most notably the fact that you cant map channels to the various AV/RGB/VGA inputs, meaning to get a PC display, i sometimes have to push the mode select button 5 times, rather stupid if you ask me. Also there's no option to adjust luminance, which might reduce the grey factor at the expense of less white (there's more than enough at present to afford to lose a little) Other areas are good though, there are a lot of sound options, although i've turned off the TV speakers, as i expect have most of us with this set. There are a fair few options for adjusting picture colour/brightness/contrast etc, but they dont seem to have much effect unless you move them up by 20 or 30.
All in all, i'm happy with the set, but disappointed with some aspects at the same time. I hope i can get used to the grey, and sort out the DVD quality, because then i will be totally happy. 7/10