Remote Access / Windows 2008 server

My office has now a branch office about 200kmts away from the main office.  We have the Premium version of Peachtree Accounting software.  Since this branch has also our store there,  our purchase and sales people have difficulty in maintaining the stocks.  We have been using p2p networking in the office but now would like to setup a domain with windows 2008 server software.  Which version of the windows 2008 software would be best suited for our requirements.  Also how do we go about linking these the store computers to the server(not in the  same location) remotely.  Someone was saying using a firewall (Sonicwall) or lease line(very expensive).  Is there any other way of hooking up.  Someone was also suggesting using Microsoft Small Business Server software.  We are having a good internet braodband speed of 8MB of data speed which can be increased to 30MB without much expense.  All ideas are welcome.
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i hope i understand you right, but i think the easiest way is to connect the 2 sites via IPVPN or something similar you ISP can do this very easily.
You need a VPN network. You can create it with routers or firewall/routers with VPN funcionality, or just via software with OpenVPN, or with Windows Server 2008 RRAS, or with other software that may add VPN SSL functionality.
You could create PPTP or IPSEC tunnels (point to point), or at the last option, you could just install the firewall/RRAS server in the main office and let the users in the remote office do the VPN dial under demand.
Do you have a fixed IP address in both offices? Or just in the main one?

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jake10Author Commented:
So a fixed IP address is a must.  We don't have any fixed address in the office or the branch.  It is a very costly affair here.  Anyway around without fixed IPs.
Yes, the workaround is to try with Dynamic DNS: or similar. The list of options is here:
jake10Author Commented:
But an fixed IP is a must
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Windows Server 2008

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