Ask HN: What's the best dev laptop?

I love my macbook pro, but when I evaluated the latest models, I can't bring myself to buy one again. The specs seem lower than similarly priced competitors, and NO USB slots? I think it's time I look elsewhere.

My plan is to install Ubuntu, on the machine. So I've been looking at the Dell XPS 13.

I want a machine with a great display, I like the 13" form factor. I also really loved the aluminum shell on my MacBook (I've dropped this laptop countless times).

What do you guys recommend?