I'm looking for suggestions for a good monitoring tools, or tools, to handle a mixed Linux (RedHat 4-5) and HPUX environment.

Currently we are using Hobbit which is working reasonably well but it is becoming harder to keep track of what alerts are sent out for what servers.

Features I'd like to see:

1. Easy configuration of servers.
2. The ability to monitor CPU, network, memory, and specific processes

I've looked into Nagios but from what I have seen it won't be easy to set up the configuration for all of our servers ~200 and that without installing a plugin into each agent I won't be able to monitor processes.