A little finding I made last night, which may help others who care about fan noise. I'm disappointed with a few features of this projector, however the deal killer since day one has been the fan noise. What I didn't realize that that it's more than just the lamp settings which affect fan noise, it's also the picture mode.
From my testing, Standard and SmartEco both seem to put out about the same brightness and same dB levels, so for this test, I only compared SmartEco and Eco. I've also found that Cinema mode is quieter than Standard mode.
The measurements were pretty unscientific as they were done with my phone, laying next to the PJ approximagely 6" away. I couldn't do a better test with a calibrated meter as mine only goes down to 60dB. The actual numbers' accuracy isn't what's important, what's important is the relative noise levels of each setting. I should also say that the audible difference during the test was pretty significant to my ears (don't forget, every 3dB is a doubling of sound). Without further adieu, here are the results:
LAMP MODE PICTURE MODE DB
Eco Standard 41/42 (sometimes 40)
Eco Cinema 39/40
SmartEco Standard 43/44
SmartEco Cinema 44/45
P.S. Keep in mind the numbers are high because they were taken so close to the PJ with the table serving as a reflection point. I did this on purpose. I'll do a comparison of the W1070 to the Optoma HD25 when I get it next week and publish those results as well.
P.S.S. I've measured the numbers several times, going back/forth between modes. It usually takes 10-20 seconds before the changes affect the fan noise