SBS, CALs and Windows Server

I have a client who wants a server for VPN, Remote Access, Print Services, Database, File storage. They have 7 desktops and two printers When I recommended Windows SBS he said he would rather have Windows Server 2003 because there he can get more than 5 CAL’s. There is plenty of info on the number of CALs that come with SBS ( 5 included then you buy more to expand) but I cannot find anything useful on Windows Server. Is this logic on his part sound or is it oversimplified?

A