This is probably an unpopular view, but I kind of use laptops as if they were terminals. If you want to spend $2k, I'd invest $1600 of that in a great desktop machine, and spend the other $400 on a cheap chromebook and tablets / keyboards / gizmos to log into it remotely.
Then a ex-corporate laptop from eBay that I'm not too worried about breaking/losing. Dell laptops tend to have the best support of Linux.
I spend >80% of my time in the same place, so it makes sense for me. If I'm out and about, I won't be doing "full" work anyway.