The X220/30 is still a very viable Dev machine if you don't mind the screen.
As a word of caution, I went down the MBP route myself and was recently caught with the dust under the keyboard membrane problem. You probably aren't accurately evaluating how annoying it is to randomly lose your laptop for a few weeks while they repair the keyboard. I certainly was not.
As a word of caution, I went down the MBP route myself and was recently caught with the dust under the keyboard membrane problem. You probably aren't accurately evaluating how annoying it is to randomly lose your laptop for a few weeks while they repair the keyboard. I certainly was not.