I have been running Precise Pangolin on a Samsung series 9 15" (NP900X4C) for a while now (with Xmonad, too). It works wonderfully and all the external hardware I've tested (Logitech HD webcam, USB headphones, ...) have worked fine. Only recently, I've been hitting a hard wall trying to use WebGL (for Acko.net's MathBox, specifically). Despite trying for the past two weeks, I could not get this to work and have resorted to dual-booting to Windows 7 (where WebGL does ... just work). This seems to be an issue with Intel HD 4000 graphics under linux (which System 76 laptops and the Lenovo X1 Carbon have in common). It was not obvious from the RedHat website whether RHEL suffers this, so I've sent them an email (but no reply yet).
If anyone knows an actual fix (i.e. not just the various things suggested in obvious search results), I would buy you a beer. But, yeah, replacing this machine with a System 76, or re-partitioning and dual-booting, or buying RedHat are all options I'm willing to consider, so there's that. Other than WebGL, I heartily recommend the Series 9 laptops (I had a 13" series 9 previously, as well).
If anyone knows an actual fix (i.e. not just the various things suggested in obvious search results), I would buy you a beer. But, yeah, replacing this machine with a System 76, or re-partitioning and dual-booting, or buying RedHat are all options I'm willing to consider, so there's that. Other than WebGL, I heartily recommend the Series 9 laptops (I had a 13" series 9 previously, as well).