This is what I have is used since 2016 as my personal machine. Comparable in price to a MacBook Pro and easily outperforms a MPB. Specs on mine:
Intel CoreT i7 6700HQ (4 core s, 3.5GHz)
16GB RAM
15" 4K Display (1080p is standard, I upgraded. No regrets).
GTX 970M
256 GB SSD (system drive) + 1TB hard drive
Installing and running Ubuntu has been a breeze.
Like a MBP it has an aluminum body and weighs less than 4lbs.