Whs2011 Vs Windows Server 2012 Essentials Vs Windows Storeage Server 2012

Looking to replace my old WHS v1, I've decided on the HP Proliant N54L just need to decide on the OS now, ignoring cost which of the following would be the best replacement

Windows Home Server 2011
Windows Server 2012 Essentials
Windows Storeage Server 2012