Appreciate the input, guys... I returned the Samsung and got a Sony Bravia 40V4100.. the Samsung's picture was worlds better, but this TV has a game mode and considerably better input response time. It still lags just a tiny bit compared to a CRT, but not as drastically as the Samsung I had before. I still get worse lag on the 360 unless I use VGA for some reason, but whatever, not a big problem since I do have a VGA cable afterall

PS3:
HDMI, Component, any resolution - all the same response speed, very tiny lag
S-Vid, Composite - slightly more lag (obviously)

PS3 when playing PS1/PS2 games
Any conection - worse lag than S-vid.

360:
HDMI, Component, any resolution - more lag than PS3
VGA any resolution - apx same lag as PS3 HDMI/component, maybe less
S-Vid, Composite - again slightly more lag


Here's the kicker:

N64:
S-Video - ... no lag o_O

Saturn:
S-Video - slight lag


I dont have the time or attention span to test anything else today, plus I have to get ready for work, but suffice to say WOHD is playable. The screen itself has a bit of ghosting/image trailing because the LCD element doesn't update in time when it transitions out of full-black, but that doesn't affect gameplay response time. I think the store will kill me if I try to return this TV too, so I might as well pay it off and keep it for a while.