Go for it!
Hi Johnny,
I bought the KDFE-50A10 last week and it looks great. I ran the DVE disc and it made a huge difference to the out of the box picture. As with most factory settings, it pushed reds and had some serious contrast/brightness issues.

Watching analog CATV is actually considerably better (after calibration) than I expected it to be, based on what other posters said about analog quality. DVD's look awesome and I can't wait to see some HDTV content.
I do have two minor beefs with it though. The "screen door" effect IS noticeable, especially with large areas of uniform colour, like sky etc., but it depends on how picky you are as to wether you'll even notice it. My wife thinks I'm seeing things
The other small issue is that it's difficult to run the DVE setup on the Antenna input, since the DVD goes through component. I would like a way to copy settings from one input to another as a starting point for tweaking all the inputs. I just wrote mine down, however, and went from there... plus there are independent settings for each input (3 if you include the "vivid" and "standard" with the "custom")
I hope this helps.
BTW I got mine for $2799.00 at FS. They can definitely do better than their advertised $2999.00 sale price. As for the extended warranty... I got one, but it's a great source of debate on any forum.
Good luck!
Banta