I've got a 4g version of Rock64 with 64G emmc.
But I don't know too much about Linux.
Hi,
I am similar to Luke and have been running a Webserver on a 2GB Pine64 for about a year now and it works great. It is definitely low volume.
Regarding your question on the best image, I find that people gravitate to the distribution that they are familiar with. The choices are primarily Debian (Jessie or the newest version, Stretch) or Ubuntu (Xenial). They both should work equally well and the choice comes down to which you prefer. I have stuck with Debian because I originally started playing with Raspberry Pis and they use Debian as a base. I also played with Xenial on the Pine64, and it did not work as I expected. To be fair, this is likely user error on my part.
In short, I like Debian and have been happy with it on my Pines and now my Rock64. I am sure that there are others here who will feel equally attached to Ubuntu. Either will work fine.
The only other thing is that there seems to be more Xenial options including ones with a desktop pre-installed. There do not seem to be any desktop-enabled Debian images yet for the R64. You can easily add one yourself, but it is an extra step.
Use ayufan's xenial or jessie minimal images.
Community administrator and sysadmin for PINE64
(Translation: If something breaks on the website, forum, or chat network, I'm a good person to yell at about it)