My board that am am still in the progress of building is a nice canvas mat stapled to a 4x6 piece of high-density foam.
<-- That is the mat, and where I got it from.
I'm in the process of making grassland/hilly area pieces of terrain with ruined buildings and trees.
I generally just like a normal table like I described.
Themed tables are great, but...Static. Its uncomfortable to play a Apocalypse game on a pristine jungle, you know?
Storage is easy, simply take terrain off and but in a box gently, and set mat-stapled-to-board against the wall.