Server 2012 vs 2008r2

I am looking to manage 50+ off site computers, functioning as servers for multiple endpoints.  It has recently become apparent that the data transferring to these computers is being attacked, forcing me to create a more secure network at these sites.  A change will be made to a Microsoft Windows Server, but which one will best suit my needs.

Server 2012 Essentials appears to have made great progress with Active Directory and IPAM, making me take a closer look at it.  I do have endpoints that are x86 and have had issues with them using Windows 7 64 bit on my server, as a key program I use does not play well going from x64 to an endpoint running x86.  This is a key concern, along with the fact that I am familiar with using Remote Services on my office server that is running Server 2008.

Speaking of which, the information from my 50 off site computers come into the Windows 2008 Server, server.  Will I have to update to 2012 on that server as well?

The big question is such.  Being that I am familiar, and comfortable, with Server 2008.  Are the improvements made to Server 2012 Essentials great enough to look at it as a partner with Server 2008, or a replacement; if needed?  As always, budget is an issue, but safety and being able to regulate and secure the off site devices is priority 1!
Deleted by Netminder, points refunded:  1/5/2014 12:53:33 PM