I just got my pro8100 last night (ordered from TD), and I gotta say, this thing is awesome. Sitting about 10 feet away, 110" image, no SDE, or any other nasty effects; just pure awesomeness.
I upgraded from an aging and ailing Infocus 4805, and I upgraded my DVD player from an Oppo 981 to the Oppo BDP-83. Gotta say, I'm really, really happy with this set-up, and I haven't tweaked the settings yet or anything. Black levels are superb (at least, in my light-controlled room with white walls and ceiling, this is probably about as good as the black levels can get). The Pro8100 is almost totally silent (major improvement from the 4805), and in 3 hours of Blu-ray watching last night (an episode of "Planet Earth" and "Crank"), I didn't notice the dynamic iris even once. BTW, my unit had the latest firmware (1.51) preinstalled on it, which is the version that fixes the iris issues.
The build quality on the Pro8100 is top-notch, but, as mentioned elsewhere on this forum, it is really, really massive...so make sure you have enough space before you buy (I'm going to have to build a bigger shelf for it...).
Now that it seems like so many people are buying the Pro8100, we should start an official thread so we can pool knowledge regarding settings, performance tweaks, etc.