I ll go for the 3..
These days things have changed.. shouldn't be a problem anymore.
Just remember now like quite long time ago.. 15 years.. CRT monitors ftw.. was lucky enough I had quite a good and had an argument about a musicvideoclip with a friend.. there was an item there I could clearly see it and he didn't see it.. I was wtf mate you blind?!Not all of us have bright enough screens to see some of the darker stuff some people do, so it can be a real challenge.
These days things have changed.. shouldn't be a problem anymore.