Be careful, BB has only 15 day return policy if you don't spend that much $ in the year. They are being trained to be aggressive and refuse returns as much as they can. Don't forget those metal plugs that go on the stand! I did and they refused my 70" return. I'm in NY though.
Even though the floor model might look ok, the one you end up getting could be worse. I had 45 days to return my tv and even that wasn't enough to know if it was going to bother me in the long run. For me, I only notice the cloud when the screen goes to black, which is usually only during opening/closing credits. Movies do fade to black in the middle quite often too. I don't see it with content on the screen. Do I hate it? Yes. I am not in love with my tv, it's just a tv. I'm going to wait until new technology comes out where I don't have to go fishing for an acceptable tv. And I probably won't feel bad about getting rid of this sony. These are "budget" Sony models and I have been all over the other manufactures avs threads on here and they all have this problem. The Samsungs are plagued with this thing called the "Ice wing".
fwiw, take a look at my 70" that I got
. Looked just like yours. The clouding was noticeable with anything on the screen. I couldn't deal with that.
My local BJ's has a 90 day return policy and no questions asked return policy. Unfortunately have to pick up a 50" for upstairs. Contrary to what I said above.