"There is no such thing as perfect equipment. " who the hell said there was ?
"something you have to decide for yourself" well asking for advices is a part of it, especially if you don't have the money or time or opportunity to actually test them all.

Damn how these useless answers annoy me.

It remains blurry what the creative input of Kubrick's DPs were given that he was a DP himself.

Take Your Documentary Skills to the Next Level by shooting vertically with your DSLR

For Birdman and The Revenant, he relies a LOT on color grading, with a ton of subtle windows : lighting up the faces and adding some local contrast to them, bringing down some of the background, adjusting saturation etc etc. I'd really like to see what the movies would look like with a simple Rec709 LUT without grading. (All that doesn't make him less of a great DP mind you)
Here's and interview of Birdman's colorist, he does some demos : https://www.youtube.com/watch?v=XxXWs74dKnE