Wanted to update the people here with the latest on my TV search.
After trying out the 70" 632 and Panasonic ST30, I have finally found a winner in the Sharp 70" 732.
On the 632 I suffered from the diamond pattern, clouds, and a substandard PQ. With the ST30, buzzing and green blobs. The 732 was PERFECT out of the box. No clouds, no dark corners, nothing. Best of all, the diamond pattern or DSE seems to be severely reduced on this model.
Quattron aside (I turned the expanded color gambit off), this set shows a noticeable PQ increase over the 632. Images look sharper, colors have more pop and there is noticeably less graininess and much better shadow detail. After reading several reviews and other things, it was clear that there truly are several other differences between the 732 and their cheapest 632 model besides just a yellow pixel - it appears to just be a better panel all together. FYI I did use Disney WOW to calibrate all three sets.
My advice to anyone looking at these models is to just bite the 300$ price increase bullet and go with the step up model. To me, it was worth every penny.