Hi rlquigley,
I would be very cautious about choosing the Worlds Best Bed in your weight range. It’s their softest mattress and has thicker layers of very soft latex than their other mattresses (see post #2 here) which means it could be a risky choice both in terms of durability and suitability/PPP. It may be worthwhile rereading the information about higher weight ranges and couples that are in very different weight ranges that I linked in my first reply.
Phoenix