Hi,
The question is not "
what is the best edition (of any distro)?" but "
what distro suits my needs the best?" ...
And - not stable - of course, if you plan on using a beta...
The starting point should be to determine what you're looking for in Linux. Ease of use? Ubuntu/Xubuntu all the way. Ease of use but the odd adventure (not-ready softawre but fixable) go for Fedora any time. More into the deep? How about Arch Linux? Or, just the stable old worktop that you can rely on? Then Debian is what you need.
A distro is as stable as the community thereof can get it, it is you (the user) that punches the holes

- dont rock the boat, dont get the holes...
I had great times (still have) with Xubuntu (Ubuntu's little sister)....
Thor