I own a Hitachi 46F500 and it's nice. I had to manually calibrate it by going into the service menu but once i was in and made a few adjustments everything started to look nice. The only issue i had with it when i bought it was a high green push which is why i had to find a way into the service menu. But while in the service menu you can manually adjust everything including greyscale, skin tones..etc
Here's a link to getting in the service menu and how to adjust certain things.
CLICK HERE
First of all the new models had* a unknown service menu code up until 1week ago, which was leaked BY ME because i have a service manual for the set.
and my set has no color decoder, so there is no fixes to correct my red push, nor fix my blue which is underexagerated by %10
I also leaked the new DCAM convergence steps, which I performed but did not really make drastic improvments(though blue halos are minimal now because of the dead on blue gun convergence that DCAM allows)