Good review. I will continue to complain, with a smile, that I wish the reviews got into a bit more detail on some of the basics...
ie: What does the offset mean when it comes to a 100" diagonal screen? (I know this, but others may not)
What is the actual brightness of the projector and what environments is that amount of brightness, and at what screen size, is it usable?
How well will the remote work within a universal remote system? Sometimes the on/off is really tough to deliver with a single power button.
What models are comparible? The 6500UB is discontinued, so what is the real competition for this model and at what price point? Viewsonic 8100? Optoma HD20? BenQ W1000? Other?
Is there frame interpolation on this model? How does it perform if so?
Really, just a few questions that I think would be good to answer and help people with their buying decisions. This is one of the best reviews overall that I've read and I have no issues with the scoring/rating which I typically like to complain about.

I've not installed one yet, but will be doing so hopefully in the next month or so. The 8100, in my opinion, is one of the best super flexible install projectors available. The lamp life is better than average, and it has good brightness. Image processing could be better, but is not inappropriately poor either. Feed it a good source (Blu-ray, high quality upconversion) and you will get a good image.
A blurb on organic vs. inorganic panels is also necessary since most people are unaware that the inorganic LCD panels, as used on the big brother 8500UB and the old 6500UB are designed to last longer compared to the organic LCD panels which the 8100 uses.
I am a bit suprised that the 8100 is being compared so much to the 6500UB, when it is designed as the replacement for the 6100. In almost all regards it's an upgrade on the 6100, which was no slouch either, and comes in for less money there as well.
Good stuff on this review and people really should be putting this projector way up there if they can hit the price point for it. Epson has really been putting out some nice product in the past few years for the home theater market.