I'm planning to deploy a bunch of new M610s running ESX - what should I be using to monitor these? OMC or ITA? Slightly confused as the OMC readme talks about migrating from ITA. I understand that I'll want to install OMSA myself.

Presumably either solution will monitor the chassis and CMC as well?

DMC = Dell Management Console
ITA = IT Assistant
OMSA = OpenManagement Server Administrator
DCM = Dell Client Manager
OMCI = OpenManage Client Instrumentation

You install agents on servers (OMSA) and clients (OMCI). OMSA can also be used for one-to-one monitoring. To monitor many servers or client you need a one-to-many monitoring software that uses OMSA and OMCI. For servers that software is either the pretty new DMC or the older ITA. DMC will replace ITA in the long run. For clients the one-to-many monitoring software is called DCM and can be installed during the DMC-installation if you so choose.

Hopefully that made some sense.

"
Hopefully that made some sense."

Very much so, thank you.