I've got an MSI with a 1070 in it, you can find them for under $2k USD. I'd have bought the 1080 but they weren't in yet when we sold our 980 unit. MSI aren't anything special, but work well enough for a factory laptop IMO. SteelSeries RGB mech keyboard, 17" or 15" lcd, SSD, 1070 or 1080...any of them will run AH3 and most other games just fine. I run full settings with the environmental at 1 notch and it's pegged at max FPS on the LCD display on the notebook offline, I haven't tried it online yet.
I compared our 1070 6700Q to our 5960 with a Titan(older not the Pascal) before we parted it out, and it was at least as good FPS wise with every game we tried up to 60hz/fps.
Finding a used 970 or 980 unit should be easy now too, and cheap, I see them going for under $1000 Canadian all over right now since the Pascal mobile ones came out.
Scroll down to the bottom of http://www.geforce.com/hardware/10series/notebook#shop, choose your favourite vendor and see the multitude of options available.
Hey, my hometown vendor is now on that list, MemoryExpress, I've dealt with them since the P2 450 was king of the hill for a PC, they had one little 2 room shop in Calgary right off the TransCanada Highway going through the city. Now they have a dozen shops across Western Canada. I got my 1070 MSI laptop from them.