I totally understand not wanting to sift through the other thread, but by posting there, you may have gotten a quicker response and probably more responses. I can tell you this.... This issue is plaguing the 65". It is the panel. Some are better or worse than other but I have yet to see someone post about the 65" that didn't have it. I believe Samsung may even have stopped production of the 65", although I'm not sure they'd admit this is why. I have a 60" and there is no banding at all. No break in will change the banding issue although some settings seem to alleviate it. Read the last 2 pages of the other thread. If you can't live with it, return it for another and another until you're happy, or have them keep replacing the panel until you're happy. If that doesn't work for you but want the Samsung, try the 60" if that works for you. Unless you're loaded, then try the 75" 9000, which still has banding but it seems to be much less. If you still want an LED LCD 65" but can't take the banding or switching them out, the Sony 950 appears to have less banding, perhaps more in line with the 9000 - but it is more expensive thank your 65".
Some of the clouding will diminish after 3 weeks or so. I didn't believe it, but it was true. Some settings and other techniques can diminish that as well.
Good luck in whatever you decide!