Looking for a private type of thing like Dropbox

I have a client who wants to do something like Dropbox, but doesn't want it hosted on someone else's servers.  I had proposed an old school VPN and offline files, but they didn't really like the log into the client first, then you get files and I also had problems with users NEVER  logging in, only using the offline files, and the information gets stale or they have no idea what to do with version control.

So I am looking for something that will sync files/folders of a given share on a private server that works in similar fashion as carbonite or dropbox.  It also does not have to be free per se.   I found OwnCloud, but was wondering what else might be out there.  Also, it seems to be geared more for a home user perspective.  I am hoping this can be integrated into an AD environment so end users would use same login information.  I also just found FileCloud, which looks like what I need, since it handles a offsite mapped drive, which is very appealing since that is what users are used to.