Does your Samsung 240 Hz confer a clear advantage over 120 Hz?
I still have a Vizio "HD-ready monitor" LCD that I bought 7 years ago (?) that has a remarkable lack of motion blur. It was a standout compared to all the other LCD screens.
I wanted a larger screen so we switched to a 120 Hz Samsung-with-highly-rated-speakers. [Then I connected Mackies as external speakers.]
The later-model Vizio LCD screens I saw were not so good at preventing motion blur.....