There is no comparison to a 720p Acer to the Viewsonic except the Acer comes with 3D, the Viewsonic is far superior to the Acer. The Viewsonic is higher in resolution, sharper, has a faster color wheel, more segments on the color wheel, and several other benefits.
Even Art @ pjreviews.com rates this projector very highly against the Benq w1100 and Mits hc4000. The Mits hc4000 does better for movies, but it costs almost double, and in bright scenes the Viewsonic and Mits look very close, practically identical, most people could not tell the difference (even I would have trouble), but the Viewsonic is WAY brighter, almost 3x brighter. You can use this thing with the lights on, and I am not kidding. Yes, I owned the Mits hc3800 and hc4000 DLP, now I own the Viewsonic because I have a $3000 JVC for movies, and use the Viewsonic for everything else. That doesn't mean the Viewsonic looks bad in movies, trust me it doesn't, it does movies just fine. Only if you are trying to get better black levels will you really care.
I have a refurb unit with the oldest firmware, the newer models are much less likely to even have these issues because we know Viewsonic addressed it with an updated firmware. I just didn't get the updated firmware. Even with the color reset bug I really do not care,I just go in and revert the settings back in 5-10 seconds and keep going. Also it doesn't reset my CMS, only my user profile (only 3 values). I leave the projector on almost all day, it has a 6000-hour rated lamp life. I never lose ECO mode unless I am playing around in the menu, but these are such minor issues.
All I care about in this price range for DLP for my use is the following:
Sharpness (Viewsonic and Benq sharper than the Acer)
Resolution (Viewsonic is 1080p, Acer is 720p)
Brightness (1500 Lumens Best Mode, are you kidding me?)
Color (Very punchy, rich dynamic color)
Gaming (no motion issues in gaming, looks smooth)
Movies (great for bright movies, still very bareable in most dark movies too, the intrascene contrast is very good)
Image Processing (not that far behind the Mits hc4000, not quite as clean in noisier sources but definitely better than some projectors, looks perfect in blurays or clean sources)
General Motion (some potential panning issues, but I don't really notice it)
7-Segment Color wheel instead of 6-segment, 4x speed
LESS RBE (due to either the 7-seg color wheel or the slightly worse black levels, but either way I really appreciate the lower RBE in gaming)
I don't see how anyone can fault this projector at this price, I have a $3000 JVC and I still like this projector over the JVC for certain content (especially animated films, gaming, documentaries, TV, Netflix). The JVC of course can look better at times even in that content, but at least I don't burn up my expensive JVC lamps.
People are under-selling this projector because of firmware issues, but for the most part I think most of this was fixed.
Oh and did I mention a 6000-hour LAMP in ECO-MODE that only costs $200 to $250 for a replacement?
The only real fault is black levels, but no projector that can pump out 1500 lumens in a best mode is going to have the best black levels, also a $60 ND filter will help tame the brightness and perceptibly improve black levels. For people that think the RBE is too severe, it is only because they need an ND Filter, this projector is so ridiculously bright, the RBE will be massively tamed when you get the brightness right. Also the Contrast/Brightness settings can be used to take the LUMENS way down instead of an ND filter, it will cost you a little contrast, but not a terrible amount.