Keep in mind that LED sets are in reality LCD sets with different backlighting. 120Hz refresh rate set is still a 60Hz set x2 (60fps x2 = 120fps), each frame is shown twice to mimic 120fps. The only real advantage of a 240Hz set is for 3D but, because of the electronics involved for 3D, you should get a slightly better 2D pic. I don't think there is a set that is 100% free of judder 100% of the time but that depends in large part on your source. FWIW, I have a 120Hz LCD (CCFL) that has never exhibited judder with my BD player playing Blu-rays. Even OTA tv is pretty much judder free (but not 100%).