It used to be that you could have one or the other: a cast-iron classic soaking tub or a whirlpool for relexation. Not any more. The manufacturer says this tub satisfies both requirements: The 61-inch tub can be used as a traditional soaking product, but concealed under the base is an air system that can deliver a gentle message. Made with cast iron and and vitreous porcelain, the tub has 18 jets, a variable speed blower, a heater air system, and a control pad. Cost: $1,550. Sunrise Specialty. 800-444-4280.