Ok so, some thoughts after about 5~hours of use over 2 sessions.
During set up, I noticed the build quality to be substantially higher than the 750, being that I had both there as a side by side comparison. There's like a brushed metal thing going on for the bezel on the W80 (which by the way is about half the size of the bezel around the 750), whereas the 750 has the shiny plastic thing going on. I had some wiping to do of the panel on the W80 after install due to the sheet i had it laying on during the install of the wall mounts to the back of the set. First thing I noticed was how different the panel itself looked up close compared to the 750 panel. Not better, not worse... just, different. Slightly more reflective too.
So, once I got it powered on finally, the settings were all jacked up on demo mode and sure enough there was clouding. I mean what LCD set does not suffer from this! Maybe at this point I'm just so numb to it all after 3 sets of TVs in 2 years LOL...
PQ overall was superior to my 750 by a slim margin. One thing is for sure, this TV is WAY brighter than my 750s to the point where I have my backlight on Min. Banding is at a minimal, to the point where it doesn't stand out like it did on my 750s and I have to proactively search and find it to even see small amounts on extremely limited portion of scenes. It is also not present when gaming, in my play sessions.
But it gets interesting from here.... by the end of my second session with the set, the clouding has altered. What started out as two sweeping portions of "clouds" in the upper right and lower left of the screen when I first powered it on has now diminished to the point of almost uniformity. This is with ALL applicable PQ setting set to 'Off' mind you. To counter that, there is a small, 2 inch light blotch of cloud that wasn't present when first using the set. Given that I have been heavily wiping the screen (gently of course) the entire day, I'm starting to think the "trick" of rubbing the panel with a soft cloth may hold some merit when trying to eliminate clouding issues.
Other tidbits include a completely different off angle viewing experience and better 3D (in my opinion). Whereas the 750 had a more "washed out" look the further off angle you viewed, the W80 gets darker and has deeper blacks the more off angle you get. I'm not sure yet which one has the more desirable off angle viewing as I tend to sit dead center in 90% of all my viewing sessions. The 3D? I'm sold on passive 3D and I'll tell you why: the glasses. I could not stand the active 3D shutters with my 750. They were bulky, clunky, had to be recharged, costed a fortune (even though everyone says get the Playstation glasses for much cheaper) and gave me a headache with the subtle flicker after 30 minutes tops. In comparison, the 4 sets of passive glasses I received with the W80 are barely there on your face. The fact I have 4 sets means I can actually enjoy 3D with company over. And the 3D itself looks amazing. This is the closest thing to glasses free 3D.