I’m looking to buy one too but for civil engineering. I’ve settled for a minimum of 16GB RAM, perhaps an i7 intel processor, 500GB ROM and a battery life of at least 5 hours. I’m thinking a sturdy HP probook (2019 and beyond) or maybe a spectre. I would have loved a Mac but lots of engineers say that the CAD and other engineering related apps aren’t directly supported on MacOS.
I’m not sure whether touch screen capabilities and laptop size matter to you but I’m guessing that it might be easier to navigate CAD software on a larger screen that supports touch screen or stylus input.