FYI: Shadow detail is a function of Gamma and contrast, not a function of a particular device. I know some reviewers have done shadow detail comparisons, but it's non-sensical and they should know better. I can make any projector that has low-end gamma adjustments have as little or as much shadow detail as required. This is a completely adjustable thing, and there is no such thing as a projector having better shadow detail than another with similar contrast (unless you are talking purely OOTB modes, or a projector with no gamma calibration options).
Poor shadow detail means you have a preference for a brighter gamma at the lower IRE's. This can be adjusted on the Benq's calibration options.
Generally, many people prefer an S-Curve which means outputting a lower gamma number / brighter GAMMA at the lower IRE's at 25 IRE and below to 5 IRE.
I personally change my Gamma depending on what I am watching, some movies I find different gamma settings work better.
The Benq w1070 is said to be much louder than this projector (and I can attest that the w1070 can be sort of loud), plus the Benq is a shorter throw which means it is likely to be mounted even closer to you when you set it up and that further amplifies how much audible noise you will hear. The Benq does have more flexible "vertical mounting" with some lens shift.
For HTPC reading of text, I'd take the Benq w1070, as it has a sharper lens according to most people (and Benq's usually are sharper than Optomas), but for movies or 3D the Optoma is much quieter and this might lean me towards the Optoma.
RF is better than DLP link, so the Optoma should also have slightly better 3D than the Benq (higher contrast).
Ultimately, I think when it comes to the Optoma vs. Benq, the decision should be made on which one fits better in your room (placement options wise), and how adverse you are to noise. It doesn't take that much fiddling to figure out how to edit GAMMA, even without a meter you can do it easily enough (though it won't be as precise, but will be sufficient).
Edited by coderguy - 9/12/13 at 1:56am