The second release candidate of Enonic XP v.6.0.0 have just been released.
In this version, more than 20 known bugs have been fixed. We are now turning our attention to serious testing to find (and solve) more bugs before the final version of Enonic XP v.6.0.0 is ready.
XP v.6.0.0-RC2 may be downloaded from: http://repo.enonic.com/public/com/enonic/xp/distro/6.0.0-RC2/
Info about changes since 5.x, can found in the documentation: http://xp.readthedocs.org/en/latest/appendix/changes/6-0-changes.html
Enjoy!