2
There has been alot written/said on this very question. If you do a search you can read up on the versions. I have chosen to stick with the 2.0.x version. Currently the version is 2.0.15. Why? To keep it simple, because the very persons responsible for developing the main XOOPS core and it's road map for the future growth of XOOPS recommend it over the 2.2.x versions. So for me that is enough. The next version release from what I understand will be version 2.3 and it will incorporate many of the enchanced functions found in the 2.2.x versions. All I have to do is continue to be patient.
Quest