Why not just enjoy the status you have with EH and SW? Even though your could "qualify" for other programs, it would seem that unless you are going to use them on a very regular basis in the future and like their benefits and redemption, you don't accomplish much by switching. I would much prefer to be staying at properties as an SPG Platinum than just about anywhere else, when available at an acceptable rate.

(By the way EH=Hilton family of properties and SW=Starwood family of properties in the GDS systems)