That sanyo PLV-Z4000 does seems like it would be silent enough. Only problem is that the cheapest I found it here was about 2100 euros so a bit much. But I'll have a look at their other models and see what I can find. Thanks for mentioning sanyo
I didn't even know about them since where I live it's most acer, benq and epson that I hear about.
And I usually don't trust the reviews about noise since most people aren't bothered about noise. That's why I asked here where it's all about the noise
Yes, you cannot trust subjective impressions about the noise, but if reviews say it's the quietest projector they've ever reviewed and you're set on buying projector, well, that's the one you're going to get.
I didn't realize Sanyo's cost so much in Europe. If PLV-Z4000 is too expensive, try looking for Panasonic PT-AE4000U, see if you can get it at a reasonable price. There is also dated Sanyo PLV-Z700, which was released soon after PLV-Z2000 and was intended as a budget 1080p projector. From what I remember it had lesser picture quality two years back when it was released and projectors made a lot of advance in the last two years, so given that PLV-Z700 is still being sold at almost the same price as when it first came out, I would probably recommend against it. However, it is an option.
Most important thing, like I said, read reviews. I haven't kept up to date with newest projectors since I bought mine (no point in wasting time reading reviews for a thing I'm not buying, and I'd get a major "new toy" envy
). So my knowledge about current projectors is a tad dated. Read reviews, read comparisons, read AVS forums, do your research.