System Center Licences help

Hi,

I`m planning to buy System Center and have some doubts about witch licences i need.

I have a 3 node vmware cluster with 96 total physycal cores.

I'm planning to use configuration manager to manage deployment, updates and app installation on near 400 client pc.

As i understand if i buy datacenter edition i can manage all windows servers on the cluster and have to buy 400 operations manager client licences for client pc's and with standard i have to buy client licences for servers to.

Is that ok? 

Thanks