Well it must be always kept in mind that the heavier a person, the firmer the mattress has to be to provide adequate support. If still you are in the same dilemma of which mattress to consider, I would suggest you considering a Queen Size Medi-Coil Permatuft Plush with Latex to replace your old mattress.Even you can go for the Medi-Coil Permatuft and Cameo...they are designed for heavier weight.