Panasonic tc-p55st50 vs p55gt50

Hello,
I recently joined this forum and was wondering if someone might be able to help me decide between these two HDTV's. My room is light controlled with one twin window to the left of the tv as your are looking at it. There are blinds on it though, so it should not pose much of a problem. I have found some great deals online for both the ST and GT models. Currently, I can purchase the ST for $1150 and the GT for $1350. I'm sure I would be completely happy with the performance of the ST, but given the large discount on the GT, is it worth $200 extra dollars for the added THX mode and more advanced calibration controls. Am I missing something? Thank you in advance for any thoughts or comments.

Gregg

Thanks for the link. It was very helpful. I should have checked the forums first. Sorry about that. I, like you, think the nicer bezel and the THX pic mode settings are worth the $200 price difference alone. Not to mention the higher steps of gradiation(24,576 for the GT vs 12,288 for the ST). Thanks again!
GW