SQL Server 2014 Licensing Questions

I recently purchased a nice new shinyDell PowerEdge T630with some beefy specs:

• 2x Intel Xeon E2690 v3 2.6GHz, 12 Core/24 Threads (48 Threads...wh00t!)
• 4x 16GB 2133MT/s RDIMMs (64GB Total)
• 32x 600GB 15K RPM SAS HDD (They will be in a mixture of different RAIDs on a PERC H730)
• 1x QuadPort GB NIC
• Windows Server 2012 R2 Datacenter

The hardware was the easy part. Now for the tricky part (licensing...)

The server is going to be used as a Hyper-V Host, with one of the VM's being for SQL Server 2014. Windows Server 2012 R2 Datacenter gives me unlimited instances of VMs, so I do not need to purchase additional Server 2012R2 licenses, however I am not 100% clear on the licensing for SQL Server 2014, and am reaching out to y'all for some advice.

I am aware that to license SQL 2014, my best bet will be to do it on a Server + [User/Device] CALs, as...