I just can't make a decision, after a month (!) of reading and researching I admit I'm lost. Even Rtings.com can't help me decide between the two TV's. X900F (65") is newer and will probably get Oreo. it is a FALD but equal almost in anyway to the X930E EXCEPT (!!) for brightness and contrast which is great on the X900F but even better on the X930E. and here is my main question: What is the importance of brightness (and contrast) in HDR content, If i'm using my TV almost always in low light conditions and NOT in a bright room? does it still matter that much? I'll probably lower the brightness on both of them anyway... won't I? Does anyone have any actual experience? on Rtings.com they are both 8.3. Help will be much appreciated.