Hi thatsdopefoo,
Congratulations on your new mattress … I think you made a good quality and value choice 
The simplest foundation options would be one of the choices that Dreamfoam offers which are the 14" Genius steel platform bedframe here (which is a combination bedframe and foundation) or their Simple Life foundation here along with a steel or wooden bedframe.
If you are also interested in looking at other alternatives then the foundation post here includes more information about foundations and bedframes and has many other options for foundations that would be also be suitable for your mattress.
Phoenix