VM migration to vCloud director

Hi Guys,

I have few doubts about VM migration to vcloud director.

Setup:-

I have different customer vCenter servers.

VC1--> 20 VMs

VC2---> 30 VMs

VC3---->40 VMs

Im going to setup a new vCenter server ""VC4""" along with vcloud director this week.After setting up,we need move all the customer VMs to vcloud director(vCD).

How to accomplish this task ?

1) Migrate VMs from vCenter server(VC1,VC2,VC3) to vCenter server(VC4) and import it to VCD(import option is ther in vCD vapps) ? Is this best option or any other direct option is available to vCD directly  ?

Please check and suggest.

Thank you guys,

Manivel R