So we are on mattress #3 of the last few years. We had a Denver Mattress, then a Sealy, and now a off brand memory foam that we bought on a whim. All of them get lumpy after a year or so (king size), and the "firm" memory foam isn't so firm anymore. I sleep like hell and my back is killing me in the morning, so I need to do something. Neither myself or the wife is particularly big, so I don't think it's a case of fat people wearing out beds. And God knows it's not because of too much sex.
. The bottom line question, who makes a good firm mattress for back pain that will actually LAST?