[ovirt-users] Moving VMs from 4.3.9 to 4.4.4

What is the best way to move VMs from current 4.3.9 to a new 4.4.4. environment? The current environment is running oVirt 4.3.9 (started as 4.3.7). There is a single data domain using NFS on a single NAS. The future oVirt 4.4.4 environment will also have a single data domain using NFS on the same NAS as the current environment. What is the best way to move approximately 40 VMs from current 4.3.9 to a new 4.4.4. environment? Are there any caveats or considerations I need to take into account when moving the VMs? Your help, as always, is greatly appreciated.