Migrate VM from one Site to another without Downtime

Hi,

I have an requirement where we need to migrate virtual machines from one site to another site without downtime. Please suggest which method is more efficient

Customer has vCenter Server 5.1 with vSphere 5.1 Enterprise (ESXi 5.1)

Option 1: Using vCenter Server vMotion & SV Motion

Add both the ESXi Servers to single VC and migrate VM using vMotion & Storage vMotion

Option 2: Advanced vMotion using vSphere 5.1

Using Advanced vMotion can we migrate both (Host-to-Host and Array-to-Array) using vSphere Web Client

Option 3: vCenter Site Recovery Manager

Using vSphere Replication, Can we replicate a VM from One site to another. Please suggest the components required to achieve this.