Remote office VPN setup.

VPN newbie here. At our home office we are running Terminal servers behind an ISA firewall. We have a remote office we would like to connect to via VPN hardware. The remote location has only 3 thin clients and a networked copier connected to DSL. I?ve looked at some Cisco boxes, but not sure if that may be a overkill. I would appreciate any suggestions on what type of hardware to purchase for this size project.