A lesser known laptop company that makes custom and high end computers is Eurocom.com. They are the only company that I’ve ever seen, that has a few machines made just for 3d.
You can buy them stripped, with almost no on board storage (250 MB disc) and no OS if you like! They have screens up to 18.2" and are Tesla when it comes to fast. They re-furbish many machines so you can get last years hot rod for about a grand, prices drop another 15% because they’re Canadian, and the exchange rate is good for American buyers, bad for Canadian sellers right now.
They’re in my home town, Ottawa, Ontario, Canada so i used to go by their office/storefront/warehouse to drool. An organization of geeks, very professional.