I am planing to buy a new laptop and would like to find out which are the best with PS? The most important thing for me is laptop screen and the colours as I am working with images. I believe MAC Book Pro with Retina Display is great, but what about windows laptops? For example Sony VAIO E Series or any other?
Advice would be much appreciated. Thanks.
Check if the screen has an IPS panel.
Even if you know it is IPS, it can still have limited gamut. Most backlights in notebooks have a 70-80% sRGB backlight, which gives a very flat image. A few years ago life was much easier: Dell and IBM still made 1400x1050 and 1600x1200 pixel sRGB CCFL backlit IPS monitor laptops then. Even a Retina MB is not as pretty as those were.
Apple's Retina MBPr at least has decent sRGB coverage.