I think I'm going with: Smart Cover + invisibleSHIELD (Zagg) for the back.
and I'm glad I'm not the only one who thinks this is a good idea.
But I've heard few people complaining about the invisibleSHIELD that supposedly, is made for the iPad 2 not fitting there devices as it should, it covers part of the camera, so until they fix that I suggest you wait.
Or if anybody else have other suggestions for the back I'd love to hear them?