I made the same choice last week after the aluminum bezel on my out of warranty MBP cracked (Wtf!). Nothing in the current Macbook stable meets my criteria. The Pros are all too heavy and the MBA is currently underpowered. The X220 seemed like a much better fit for me and I have one on order as a result.

The fact that my MBP has been the absolute worst laptop I have ever owned didn't do Apple any favors.