I installed linux mint (based on ubuntu) and despite people saying it's more stable than arch, I've had more problems with it. If you ever plan to reinstall arch, I recommend antergos, it's what im using, lightweight, gfx drivers installed for you, works out of the box.
Open source, AMD's open source has gotten ALOT better recently, apparently AMD is actually helping work on them. Nvidia is still best on vendor though.