Morning,
For years I have wanted vcenter clustering... VMware says it's coming... (which is what I heard last year.) For now you have really two options:
1. Site recovery manager to automate the fail over of the replicated vcenter to the new location
2. Vcenter heartbeat which allows for a automated fail over
Personally I like #2 but it can be an expensive option. It really about what level of automatic fail over you require.
Thanks,
Joseph