Ubuntu MATE with ASRock 970 Pro3 R2.0 - are there any issues?

I need a new motherboard for my home built tower computer. I am considering the ASRock 970 Pro3 R2.0 motherboard and plan on upgrading to an AMD FX-6300 (3.5 GHz) processor. Has anyone had any issues with this combo? Can anyone recommend a graphics card that can drive two monitors with this combo? I am of course planning to install Ubuntu MATE 17.04 when I get this upgrade sorted.