You sound like me. Love my tempurpedic as even though it is considered firm, it does not cause the pressure point pain that a conventional firm mattress causes. Looking to purchase another tempurpedic need a king size, not that the wife and i are large, i weigh less now (157) than i did when i got married. By the way i am 65 and have had my tempurpedic for 10 years now.
So, go with the tempurpedic if you can afford it.