Best OS for Raspberry Pi 3

Hi there; Im trying to install a client on a Pi 3 ideally; I also have a 2 if needed and was thinking of installing ubuntu on it. Any compatibility issue/advice that anyone knows about?

Did you have a look at this topic:

I am using UBUNTU MATE 16.04 for my Pi 2 and Pi 3 and everything is working well.
There is a separate distro for the Pi’s
Have fun.