I've settled on a flobed natural latex mattress but am unsure if the 9" posture select or 12" posture deluxe would be better. I'm inclined to the 9" for both budget and aesthetic reasons (I'd rather not have such a high mattress), but would go with the 12" if it will be significantly more comfortable or offer better support. I'm 6' 2" and 190 pounds, my wife is 5' 4" and 125 pounds. Any thoughts or advice are much appreciated!