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If you just want to manage article in your website, and nothing else, I would recommand you to take a look at
SPIP which was designed for journalism, at first.
Xoops is a very powerful tool (and I enjoy using it) but it is more community-oriented (in my mind) than SPIP which focus on article management only (with a small forum too).
I think the main question is: how will evolve your needs in the future? And only you can answer to this question.
An exemple of a site using SPIP (a very famous french quality newspaper)
Happy Xoopsing