We are setting up a Site-to-Site VPN between our Main Office and Branch office and plan to use (2) RV042 routers. Since we also want to access the main office from locations besides the branch office, such as traveling, home users, etc., what is the advantage of having a router at both the main office and one at the branch office when we are not going to have the second router at the other locations? The Branch office & Main office will have their own Static IPs. Also, at the main office we have a range of static IPs from the ISP if we can/should use them??