I'm running a Lenovo Thinkpad, X1 Carbon from a year or so ago and it is, by far, the best Linux Laptop I've ever owned.

Unlike the 4 or so Dell (and Asus) laptops (that came with Linux preinstalled) that preceded this one, it can simultaneously support:

* Bluetooth. Yay!

* Wifi. Yay!

* Sleeps when the lid closes. Yay!

* Stays asleep when in my bag. Yay!

It's also reasonably fast and decently capable, but the not-trying-to-commit-heat-death-suicide-in-my-bag and supporting BOTH Wifi AND Bluetooth at the same time are really the biggest features.

The last point is really a special feature in today's laptop market, Linux or not.