Their current set up:
HQ with a 10/10 internet connection. Internal PBX system. QoS set up on the router.
2 Branch offices both with a 10/10 link. One cable drop from the switch to PCs/phones. QoS set up on the switch ports.
Site to Site DMVPN. Branch calls go over the VPN to the HQ.
I can include configs if needed. Any suggestions would be great.