Ask HN: Best Developer Linux Laptop?

What's a good laptop to install Linux (Ubuntu) on? I'm looking to buy a new machine for work. System76 seems to make good laptops. Does anyone have experience with them? Is there anything else you would recommend?

People seem to rave about their MacBook Pros. Is it easy to make the switch from Ubuntu? Do I easily get all the software I'll need (svn, git, django, python, vim)?

Essentially I think, my question is, is the experience on a MBP so much better, that it's worth having to learn the MacOS platform?