The combination of a really sharp image, a bright, vibrant image even in "best mode" very good black levels, rich colors, lens shift, very good, (not exceptional)l out of the box color, and the ISF calibration option, make the W10000 a standout product. Only zoom lens range is a limiting factor for some. My impression is that the W10000 "so far" is the best affordable 1080p projector out there.
There are less expensive 1080p models out there, but in terms of image quality, the BenQ overall has the advantage. The price is reasonable, and the price/performance has to be considered very good, at least.
As noted I'm a current owner of the very similar 720p PE-8720 projector and have been extremely pleased with it since I got it. It's definitely looking like I'm going to replace my 8720 with the W10000. The Panasonic isn't a contender nor is the Mitsubishi, they're just aren't bright enough for me, along with some other issues, and from all I hear the same is true of the Sony.