Once I looked it up, I'd seen one as I was just in REI here in Olympia. They have a 'used once' Megamat 10 LWD
77"x30" for $140. If I didn't already have 2 and wasn't travelling with a suitcase I'd have grabbed it up, heck of a deal.
I guess all have preferential reasons for using what they do.
@swhme if they make a 6" EXPED I'd recommend that for a person of your dimensions.
What people don't get is an air mattress isn't a balloon it has to be filled to a pressure comfortable to the individual
not just pumped up to full and as hard as possible, that just won't work.
Putting a 1" or so foam on top will smooth out the resisting pressures too