SBS 2003 VPN setup best practices

I have just purchased a Dell server (SC440) running SBS 2003 standard and am trying to setup a VPN connection between the server and my laptop that I use connected to the network while at the office and want remote access via VPN while at home or otherwise out of the office.  I had tried unsuccesfully to set up the VPN with the server behind a Linksys WRT54g router and now understand with research that there is a particular problem with that router passing GRE protocol 47.  I am looking at options to setup what I need, namely replacing the router or putting it behind a firewall/router device.  I was suggested to purchase a Netgear ProSafe VPN Firewall 8 (FVS318v3), but am wondering do I need a VPN router or merely a router which will pass VPN through to the server as the VPN server.  Also, if it is suggested to implement the VPN Firewall router because of security, do I also need to purchase the VPN Client software from ProSafe to setup the VPN connection to my laptop (running Windows XP Tablet Edition)?  I am new to networking know-how, so if additional information is needed to answer my question, I can provide it as needed (and as known:))  Any advice is greatly appreciated.