Migration from vSphere 5 to 6

Hi,

I want to replace/upgrade 3 nodes ESXi 5 (IBM System X) to 2 nodes ESXi 6 (HP Proliant).

There is NetApp Shared Storage and vCenter 5 standard

1) Upgrade vCenter 5 standard to vCenter server 6 standard

2) Deploy ESXi 6 to the both HP Proliant nodes and add it to the vCenter server

3) Create a new clusters with the both ESXi 6 nodes and new datastore

3) vMotion (change both host and datastore) between the ESXi5 cluster to the ESXi 6 cluster.

Is this upgrade path possible?

Is there someting wrong?

Question: I Have to upgrade to vSphere 5.5 before be able to vmotion (host and storage) to vsphere 6 ?

Thanks for your advise

Vincent