You're welcome, sizzle.
I'll just add this... assuming that your brain can't tell the difference between 60fps (60hz) and 120fps (120hz), then what would be the point of using 120hz when the vast majority of movies and shows are filmed at 24fps?
This is why... 60 is not evenly divisible by 24. To convert it over, it has to draw one frame three times, and then the next twice.. then the next three times, and then the next twice.
120, however, IS divisible by 24 so in the conversion it draws five frames... then five frames.. then five frames.. then five frames.. which results in a much 'smoother' picture supposedly.
You'll find most 3D tv's are going to be 240hz... that's 120hz per eye (alternating every frame for the 3d effect).
I have a 47" 60hz 1080p bigscreen LCD in my living room. My uncle paid 2.5X the price for a 46" 120hz 1080p LCD for his living room. Personally, I think mine has a better picture, but my first experience watching his was 3:10 to Zuma on BR and the screen transition was noticeably smoother... almost to the point I couldn't quite get used to it, but no so much that I felt my TV was inferior.
So what it comes down to is how 'fast' your vision is, and personal judgment (and price, of course).