Gigabyte has been making laptops for awhile and they have made themselves a good name in the DIY PC market. Personally, I think the 3K display on the GS60 Ghost Pro is a waste of money. You can't game on it. You'd be better off getting This Version.
The Gigabyte P35W v2 has pretty decent specs and a really slim profile, but you really pay for it. I'm not sure it's worth spending the extra. I would personally go for the GS60 I linked.
I also feel 3k screen is a waste of money just after I posted my question, and I was thinking a lot about do I really need that blu-ray drive which is the reason I may choose gigabyte. For now I am really go for GS60. Just hope my mind doesn't change again. LOL