What Panasonic Plasma model should I get?

I'm sorry to start a whole new thread for this. It's been awhile since I've read anything about TVs and I'm very behind on current models and it's generally confusing right now.

I use to have a 55" Panasonic S2 that I absolutely LOVED, I had to move though and it was too big to bring with. I bought a LG LCD TV that was recommended here because my main use of my TV is through my HTPC computer to play video games / watch TV, I guess this thing can do something called 4:4:4 chroma. The thing is I HATE this LG, terrible colors and screen tearing on every single game I play. I want to go back to Plasma and I'm pretty sure the image retention wont be a problem with HTPC, I didn't notice any burn in on my S2. So I want something like a 50" model, what model should I get?

thanks in advance.

Thank you. Will getting the picture to look great be as easy as my S2? All I did was do the changes in the debug menue then did some basic changes with Blue Ray Essentials disc.

Which should I buy

UT50 $699 55"
http://www.costco.com/Panasonic-55%22-1080p-Plasma-HDTV-TC-P55UT50.product.100027872.html

ST50 $795 (2 hours left) 50"
http://www.sears.com/wow-specials/dap-100000000108524?sid=I0084400010000100600&PID=6146852&aff=Y

Gotcha. I think I will enjoy it vs waiting for a 2013 model. Is this a decent price? I'm completley out of the TV loop, its about what I paid for my S2 when I purchased it.

Anyways, bought the TV. Back in the Plasma family. Gonna junk this LG