Never ever buy a laptop for gaming purposes. It's a waste of cash since GPUs in laptop are MUCH weaker than normal ones.
People saying you want more than 2gb memory on your GPU - that's a lie. 2gb is enough to run 2560x1600 resolution just fine. 1gb is enough (especially if you have shit monitor), 2gb is making it sure (recommended on 1920x1080 and higher resolutions).
Intel is far better than AMD let it be video editing or gaming purposes. As for gaming video card, I'd suggest to look for nvidia, but that's due to my personal experience with AMD's video cards.