Based on the TVs you've listed, I'd consider the 75" Samsung and the 65" Panasonic as the best options. The ZT60 will give you the closest picture quality you've become accustomed to. Don't be too dismayed with the comments on Panasonic's smart integration either, they have very competent software that performs swiftly on the higher end Panasonic sets. That said, the Samsung smart interface is more attractive and it is more capable with it's ability to sync with your existing cable equipment. The best argument for the 75" Samsung, though, is it's sheer size. Going from a 60" to a 75" will be a jarring difference and it will definitely will be satisfying in the short term. I would be concerned, though, how the F7100 handles flashlighting and blooming which seems to be a problem that plagues most all large edge lit LCDs. Concerning reflections, I've found that the top level plasmas (those with light filters) handle reflections and glare better than nearly all glossy LCD screens I've seen. The ZT60 probably has the most aggressive and effective ambient light filter among modern televisions.
You mentioned a $5000 TV credit alternative to the models you listed. If that is that case, I'd recommend the Samsung 64F8500 and the Panasonic VT60 over the models you've listed. Both have effective light filters and will provide picture quality in the class of the Pioneer Kuro. The Samsung is brightest among any new plasma and the VT60 can achieve the dark levels of the ZT, but can also get brighter and includes a built in camera (the ZT does not). If I were in your situation, I'd take as long as I could on deciding what was most important to "me." Size and features is a great thing to have, but the honey moon wears fast and soon picture quality is going to be what resonates most. In my opinion, I believe both the VT60 and the F8500 provide a picture quality is significantly better than the F7100 and would satisfy you most in the long run.