given the new mac book pro, genuine question: What is the best linux notebook that close the gap with macbook pro?
Ever since upgrading to Ubuntu 16.04 things have been pretty smooth. I believe any distro with a 4.4 series kernel or higher will behave pretty well.
Before this I had a thinkpad T series (I miss the keyboard, and the abundance of ports. It was really good), and I never had any problem with running any distribution of Linux.
In Summary: I think you cannot go wrong with either a Thinkpad or the Dell Developer edition. They are well made machines with good support for linux.