This.
Seen two nexus 5 devices now, even in low lighting and imo they are perfectly fine except when it comes to diagonal viewing angles. Would like them to be a bit more saturated though.....
Majority of reviews (anandtech, android police, android central etc.) have ranted and raved about the nexus 5 being one of the best android devices for screen quality. I would say the htc one, nexus 7 2013 are still better for colours/saturation and especially viewing angles but unless side by side, it is hard to tell the difference.
The sony xperia Z has an awful screen in comparison.
I absolutely love the display on my N7 2013 and even prefer it over my one S now tbh..... I will always be a fan of SAMOLED for the true blacks though
hehe true

I did have had the nexus 7 since December though
I have a feeling that it will be only nexus devices from now on