Generally speaking when looking for a distribution there is only one thing you need to keep in mind, and that is that you should only get one of the 'big ones', like openSUSE, Fedora, Ubuntu and so on. Nearly every other distribution you will find is largely based on one of the big ones, with just a couple of changes here and there that could just as well have been shipped as some extra packages to install. In fact, lots of distributions do exactly that, bundle some extra packages by default and give it a new name. Normally this is not a problem, but these smaller derivative distributions always end up kicking the bucket, and then you're stuck with whatever is the latest version they released. Much better to get one of the big ones and never have to worry about anything, because the chances of any of these ever going down are very slim.