The tech should be willing to provide a cat5 connection from the ONT, especially if it makes his install easier.
The tech will probably want to install the VZ router to ensure everything is working correctly with VZ equipment. Once he's done that, you're free to replace the Actiontec with your own router. Just be sure to release the DHCP lease before switching routers. »Verizon Online FiOS FAQ »How do I release my DHCP lease
Thanks! Does this mean that the router they provide only has an ethernet WAN port and no coax?
The router will have both and ethernet WAN and coax WAN ports. --