I've got the Sortz Tent III. Used it one year and now we use two ground tents with cots.
I really liked sleeping off the ground, but (and I really didn't think it would be an issue until we used it a couple of times) you have to unload the entire bed of the truck to use it. Everything.
And then, if you want to tour a trail, tent has to come down and your recovery kit and any other accessories you unloaded the night before have to go back in.
It's not bad to use it as a basecamp for hiking one area, but if your doing a multiday, multiple location trip it's a pain.
As for the air mattress....with the truck tents it's great. A nice comfy nights sleep. One caveat however, keep your cats away from it. You'll wake up at 2 in the morning in the woods somewhere and have to fire up the old air compressor! Believe me the convoluted bed of the truck is mighty uncomfortable!