Req: Recommendation for a web appliance

Hi,

We have a few web site contents that we managed to host on different
OS and web servers for years, but are still not satisfied with the
management side of it. We thought there should be a solution, a web
server appiance for instance, that would allow us to concentrate on
the content of it and not the security, backup, management etc. side.

The most important features would be
- the possibility of content management of different parts of sites
by different people,
- automatic update of the web server for patches etc,
- default security management.

Regards.