I am about to setup a Site-to-Site VPN. There will be 20 users at this Branch location. The plan is to setup another domain controller/file server and place it at this branch location. If I want to utilize DFS to replicate the branch office data from there to our main headquarters to backup, should I invest in 2003 R2 Enterprise or will 2003 R2 Standard work? There will be approximately 40gb of data at this remote location. What should the OS requirement for the server I plan to replicate to be?