Remote file access solution that doesn't use VPN

Our hardware: Windows 2008 R2, standard AD environment
The setup:  medium size company, about 5-10TB of storage and data, 2 locations
Requirement:  file access between the two with multi-user access, without using VPN, and secure of course

Has anyone come across a reliable solution for this?  We'd like to ultimately have users map drives between the 2 locations for file transfers.  Can someone recommend some solutions with money not being a factor?  I've heard of WebDAV, but it sounds too complex and unreliable to setup, but if it is the best way to set this up, can anyone recommend a company?  I just need something that works.

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Richard DanekeTrainerCommented:
I have often seen the remote location on Terminal Server to the Server.  This can provide encrypted communication and acceptable performance on reasonable network connections.  I have worked with a client that has all (five lcoations) connected to local servers via Terminal Servers.  

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montgomeryshireAuthor Commented:
Thanks for being the only input, a good idea via Terminal Servers.  We'd rather have a more simpler look, easier for end users.  Maybe leaning towards web gui interface or just showing up as another mapped drive.
Richard DanekeTrainerCommented:
In a maximized window for TS, it looks like and works like a normal desktop.  The TS app can fire at login to keep it simple.
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