[CentOS] Migrating away from Nagios

>Has anyone looked at using icinga ?

The forums are nearly dead, doesn't look like much of the Nagios
folk jumped ship yet. Archives show next to no activity.

Frankly, if I am migrating away from Nagios, I would likely be compelled
to put any effort into a significant improvement like Zenoss or OpenNMS
rather than trade apples for apples...