The Bain Ultra tubs (and I would think most airbubble tubs) are very low maintenance unlike many whirlpool tubs that need monthly cleansing cycles. Resale-wise I think alot of people are looking for a master bath with a tub that does something therapeutic, so I don't think it matters if it's air or whirlpool. If you're not worried about resale, I would say do what you feel is right for your lifestyle. Having the air gives you the choice of using the tub as a soaker or as a therapeutic option if your back is hurting, you've pulled a muscle, etc. With the soaker, soaking is the only option you have. I personally, like to leave my options open. Just my $0.02.
Q