The Lenovo X1 Carbon is a dream for Linux. If you want to run Linux on an ultrabook, I cannot recommend the Carbon more highly.
http://www.inaccuratedesign.com/2012/10/22/Linux-on-the-X1-C...
Fedora is also OK apparently: http://sysconfig.org.uk/2013/05/fedora-18-on-lenovo-thinkpad...
Arch too: https://wiki.archlinux.org/index.php/Lenovo_ThinkPad_X1