I'm 6'4"/255#, my wife is 5'11"/135# we have a Cal King mattress. Unfortunately, this is the second Cal King that we are going to have warrantied for 'divots'. The first was a Sealy, this one is a Stearns & Foster. We turn the mattress every 90 days or so to even out the wear but the mattresses are only lasting ~3 years before they are too screwed up for my back. I know there are some big guys on this site that must of had this problem and figured out what mattresses work. I know - two twins would be an option... ... .
Brian
Brian