XB1X apparently has 1070 levels of performance, give or take. Also depends on how long you want it to be future proof. I'd say the best price to performance ratio out of those options would be the $1699.99 Acer Predator. It would be somewhat future proof based on the GPU. A laptop with similar specs to it, with a 1070 or 1080, would last that much longer.
Have you looked on https://www.newegg.ca/ ?
https://www.newegg.ca/Product/Product.aspx?Item=N82E16834234955R Asus ROG Strix 17.3", 1070 8GB, Open box though but decent price on sale. $2199
https://www.newegg.ca/Product/Product.aspx?reviews=all&Item=N82E16834235012 Asus ROG Strix 15.6", 1070 8GB, on sale. $2219
https://www.newegg.ca/Product/Product.aspx?Item=N82E16834234955 Asus ROG Stix 17.3", 1070 8GB, on sale. $2279
There's MSI as well but I've read they generally have lesser build quality than Acer or Asus, but it's hard to say based on all of the available reviews. My brothers work just went with all new MSI gaming laptops this year for their CAD/CAM programming and he says they're great.
https://www.newegg.ca/Product/Product.aspx?reviews=all&Item=N82E16834154900 MSI GP 17.3", 1070 8GB, on sale, $1899.
