I have direct experience with OSSIM, AlienVault, SecurityOnion, Suricata, Snort, and LogRhythm in production environments both as SIEM and NIDS solutions. I have also directly configured NetFlow on Cisco routers and switches for the purpose of integrating with monitoring and security solutions.
I have designed and rolled out network topologies that take in to account sound security practices which include the use of syslog, NBAR, NetFlow, RADIUS, TACACS, and SNMP as monitoring elements.