120Hz

Bottom line here is, 120Hz doesn't mean diddly squat, unless there's something glaring about the image quality the OP is experiencing on their new HDTV. That's what he should focus on. There is some helpful explanation surround this topic for the OP in the two following threads:

http://www.hdtvtalk.com/threads/15597-What-does-600Hz-Sub-Field-Drive-mean
*focus on the last part where it talks about LCD technology refresh rates

From this onld CNET thread too:
http://forums.cnet.com/7723-7596_102-271746/60hz-vs-120hz/

http://hometheater.about.com/od/televisionbasics/qt/framevsrefresh.htm

http://www.techhive.com/article/2000157/three-minute-tech-hdtv-terms.html