A:AnswerWe have the 4K with the same "120 Motion Rate". It does NOT compare to our old Sony which had true 120 hz. We do notice the difference. Our Best Buy rep did point this out to us.
A:AnswerI bought a swivel stand for it and it's great. However the viewing angle is still great even off centered when as long as your not sitting right in front of it. The brightness on the tv is amazing so no dark corners.
A:AnswerNo one can predict the amount of problems you may incur with any TV of any brand or model. All I can answer is you get a much better picture with the S than you do with the U.
A:AnswerThis is the best way to tune your TV. It'll get you about 95% there. The last 5% is adjusting to your preference.
http://www.rtings.com/tv/reviews/samsung/js7000/settings?uxtv=0fbb