LC70C7450u or LC-70LE735u or XBR65HX929

So I was in Frys yesterday, and they had a TV branded LC70C7450u on the floor, I was unable to get a good look at it because I got pushed to the side by a salesman with a family, but it was clearly one of the 2012 sets, and edge lit.

I have been looking at the 735u or the 65HX929 and agonizing over a choice, Looking at the Demo units I could find for the 735 I noticed dark corners on a lot of them, and more than a little DSE. From the little bit I was able to see of the 7450u it seems like it had no dark corners issue, and less DSE, but I think the viewing angles might be noticeably worse, It was hard to get a good look at it even waiting forever the other people looking at it didn't leave. The 735 was in bright light, the 7450u was in lower light, the 735 was mounted at a correct viewing angle, the 7450u was well above the correct viewing height, so it's really hard to make a good comparison.

My questions comes down to, has anyone else had a chance to look at the 7450u? how does it compare to the 735u? Is anyone aware of the actual difference between the 745u and the 7450u? And is the HX929 worth the much higher price tag and smaller screen in comparison to these sets?

There are some pretty good deals on the 929 right now, and I find it pretty desirable, however I think the extra 5" is pretty noticeable, My biggest curiosity is how the 735u stacks up against the 7450u, it was pretty much impossible to compare them at Frys, due to how different the setups were. I think I want to get the better of the 2 sets.