If the VSA is your only shared storage a "normal" vMotion from local disks to other hosts is not possible.
There is one exception to that rule. If you are using vSphere 5.1 the Webclient will allow you to change the host and datastore at the same time on a running machine thereby allowing a vMotion to a different host and to the SAN at the same time while the VM is actually running, but this is a Webclient feature only in 5.1.