You have two sites with 1700's at each location? If this is the cast you can either do a router to router VPN, or set up "dynamap" VPN at one point and use the VPN client software to connect. To use the VPN client you must have at least 12.2.8T* on the router to use the dynamap feature. If you are going to be working remotely at one site all the time, you might as well use the router to router method. This would be good in a situation from one office to another where the location isnt changing. The VPN client software is design for the situations where you are traveling from location to location and still need access to one point. It is also cheaper than having a 2nd router as well. With the router to router situation, you can put the whole LAN on the VPN connection, whereas the VPn client requires the software on each workstation. Just a thought.
brian