Migrating to a New Physical Server

I have a Windows Server 2008 Standard box running SEPM 12.1.4023.4080 with clients at 12.1.671.4971.  Everything works very well and I am happy with the setup.  I will soon retire this server and need to migrate to a Windows 2012R2 box.  Two questions:  1. should I install the most recent version of SEPM and Endpoint on the server, and 2., if so, is there a straightforward way to migrate the system that is working so well directly to the new box from the old one?  I would like to leave the clients alone and just have them check in with the new SEPM.  Thanks.