How to Upgrade You System76 computer to Ubuntu Precise
I don't know your hardware specification. But I can tel you this, my laptop that is 7 year old I believe and it run the latest Ubuntu version (with Unity) fine, at bit a little slow I suppose. Your laptop seems to be newer than mine, so it could work well.
I am running Ubuntu 12.04 with Gnome Classic (No Effect). You can also use Xubuntu too.
Whichever you install, just follow this guide and install the system76 driver.