I'm looking to create a vpn connection between one small branch office and our main location which. The branch office has cable connection. The main office has a dsl connection with a Pix506e. Two other offices are connected to the main office, one by a 506, the other by a 871 ISR. Which would be the best choice to connect this office. Currently we have about ten users. Eventually this branch office will become our primary location and at some point will require a T1.
My question is, both the ISR line and Pix seem to have similar features, but the ISR's seem to have a bit more functionality. Which would be my better option?