For me, my engineering work horse is an Asus ROG 15 inch laptop which is a year old now. There are new models in the 1K buck range. What you discover is the powerful laptops tend to be gamers so you look for one that doesn't scream gamer.
Four years ago I promised a young student a new top-of-the-line iMac when he gradated. He graduates in early June. If no new iMac is released before then, there is no way I will buy him a 2015 computer, which is all that is available now. I need to know if there is another computer that engineers would love.