What kind of mattress do I need?

For the first time ever, I’m going to buy a new bed. Not new to me…. Actually new.

I want to get the best mattress for my money, that best fits our needs.

With all the advertisements for memory foam, those sleep number things, innerspring… I’m confused as hell.

Details that might matter: we’re both side/back sleepers, live in Florida (where it’s hot), hubby is 240lbs, I’m about 135.