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I agree with most of that but 240 Hz is unnecessary.

Human eyes can't perceive flicker above 85 Hz or so. Meaning, your eye can't see the difference between two screens that redraws themselves more than 85 times/sec. Those with a sensitive eye, which I unfortunately have, can see screens flicker between 60 and 80 Hz but not above 85 Hz or so. That means if there is a difference in price between 120 Hz and 240 Hz, you're likely wasting your money; especially when you consider MOST content is delivered at 60 Hz. Some is delivered at higher rates like 120 but very little if any is delievered at 240 Hz. So, even if your eye COULD see the difference between 120/240, the content isn't there to take advantage of it anyway. Point is 60 is standard unless stated otherwise (excluding plasma), 120 is better, 240 is overkill unless the price is the same as 120.