Don't Listen to the people telling you to avoid gaming laptops. I haven't touched a desktop in years since I made the switch and have no plans on going back. People claiming they don't last probably have no idea how to take care of a computer (In my house we have a 6, 5, 5 and 3 year old laps and all of them still run perfectly). If you ever plan on going anywhere or taking your computer anywhere at any point in the future, laptops is definitely the way to go.
Personally, Asus and Lenovo are the 2 brands to look for when buying one. You don't
need a RoG to play games, the entertainment line works just fine (Like the one you have). You won't be seeing super high framerates at max settings unless you want to overwork the lap, but its enough to play the game at a comfortable level.
I always use this 2 websites when checking the GPU, so far they look fine.
http://www.videocardbenchmark.net/vi...T+755M&id=2646
http://www.notebookcheck.net/NVIDIA-....102020.0.html
You should be fine. It's more important at this point to check the build of the laptop itself. Like overheating/exhausts and whatnot.