I loaded Ubuntu 16.10 into my build for just that purpose, though really it wouldn't be difficult to bump the 16.04 kernel up to 4.8+. There are also 16.04 and

I loaded Ubuntu 16.10 into my build for just that purpose, though really it wouldn't be difficult to bump the 16.04 kernel up to 4.8+. There are also 16.04 and 16.10 ppas with different levels of mesa driver that are built and tested ahead of the main repositories (stable and nightly). If you're not interested in being that close to the bleeding edge I understand, so some of the improvements at the front-edge are maybe 6-12 months out from wider distribution.