Hallo
I would suggest going to a company that builds Linux computers e.g.
In Europe - Tuxedo computers - see:
In the USA - System 76:
There are others of course.
A Windoze pre-installed computer is built with hardware that will run Windoze, a Linux computer is built with hardware that will run Linux. So it takes the "hit-or-miss" out of investing your money.
I have a Tuxedo machine, and yes I would buy another. 
But if for some reason it must be a Windoze machine (e.g. you want to buy something second-hand) then a lot of people say that Lenovo ThinkPads are a good bet, as Linux usually runs very well on them.