I'm looking at buying a new traditional non-jetted tub for a bathroom remodel... I'm replacing a 40+ year old cast iron tub. What's the pros and cons of: cultured marble vs cast iron vs americast? This question is in regard to: cost, surface durability, easy of care, and comfort. To me, it always seems worth spending the extra dollars today to avoid a major disapointment in 5 or so years. Thanks for any advice.