- Edited
degen Now I bought the EW2740L. It's at least as good as the EW2440L, if not better because I use them at 0% brightness but 50% contrast and so I have a picture with rich colors. Out of 3 EW2740L monitors I bought I had to send the 3rd one back, because I think it's not as good as the others both in terms of eye strain and also technically (hissing noise when active). The others are good, I have them for 2-3 weeks now. It's really hard to buy them in new untouched condition. All of them were sold as "new", but one could clearly see that 2 of them had been opened and repaired (probably by authorized service stations). I looked into the "service menu" of all devices (hold Power + 2nd button from the right) and they all claimed to have the same panel, same scaler, same firmware, and a reset "Monitor On Time". Manufactured May 2015.
So if there's anyone else who not only suffers from PWM but also from monitors' light intensity, those monitor series, but maybe preferrably the EW2740L, is a clear recommendation. It's a shame BenQ don't build such low brightness monitors anymore.