Use Debian "Woody" on a production server. It is the latest "stable" release of Debian, anything later has not been fully tested and still not fully bug free.
Debian 'Sarge' is not intended for use on production systems as of yet.
We are comfortable with Redhat 9 and still playing around with debian (sarge) and still quite new to OpenBSD. We are ready to takeup any distro headon if it meet our need.
c'ya Erle