If it wasn't the screen I would've bought something like a cheaper Dell Inspiron equipped with a 750M GPU and even upgrading it with a SSD and 16GB ram it would be still way cheaper than a rMBP. Another option would be a Lenovo y510p, equipped with dual 750M GPUs (actually I need more GPU/CUDA power than CPU).
The screen was mainly a hobby bonus because I like editing pictures. I still take pictures with analog cameras, scanning them later on my Nikon film scanner. Paying an extra tax for a Retina display was a real money wasting to me.
Yes, you could get all those options but you know, it comes with Windows. This is number 1 for me to not to buy anything that runs windows. I was on Linux for several years and just can't stand Windows any more.
Macbook is not only about the hardware but the overall package including UNIX OS.
That's why problematic screen, although very frustrating, is not putting me off from the retina screens.
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I think it's crazy. The whole reason for getting a model with the retina display, is BECAUSE of the display. If the display then has variations of colours/warmth it's in my perspective a defective screen. Get a refund and wait till they solve this problem - that's what I am doing. And I have the exact same issue as you with my screen (read above).
No, as I said before, You can't buy 15" Macbook without retina any more (new of course).
Retina is something that comes into all devices whether you like it or not.