I'm planning to buy my first LCD or LED TV. Preferably 40" to 42". 1080p. Not the 3D version. I'm gearing towards Samsung, Panasonic, LG and Skyworth brands in the order stated.

But one thing concerns me is the refresh rate of 60hrz or 120hrz.

One sales guy in SM told me that all Skyworth LED TV 40"/42" are with 120hrz refresh rate. Is this true?

On the other hand Samsung TVs are 100hrz?

Is there really a big difference, specially since the higher the refresh rate the more expensive the TV is?