update: I looked again and I couldn't build anything like your configuration for under $2k.I've been looking for a GTX 1080 laptop the last few weeks, but I can't figure out which of the high-end models is the best to go with. Most are variable configurable, but even a modest config would be $2200 minimum. All the ones I've seen with similar specs to yours are around $2500-$2700.
I'm looking at the MSI GT73VR TITAN Pro, The Aorus X7 DT, and Acer Predator 17X myself.