I've done that, trying sets until I find a decent one, in 2008. All 2007 models had some bad issue and we ended up paying a premium for the (back then) newly released samsung LN-T4665F (3k).
My reasoning was that all those issues would have been resolved by now (clouding has to some degree), but to my surprise the panels got thinner, but not better (since my 2008 TV does not suffer from banding).
And again to my surprise, 4 years later I still have to spend 3K for a good/decent LCD.
I can't speak for others, but IMO it is VERY distracting because the bands emphasize movement especially in panning shots. The bands drag your attention from whatever else you should have been looking at.
So, I will return the set to the store and wait. Perhaps the LG 9600 may be worth another try, but I won't be going back to the store until I read some good reviews on a particular set.