If you still have a standard plain old tub in your house, have it
replaced with one of these immediately...
It has 10 jets, an inline water heater, and it's deep! (not to mention roomy) Powerful as hell too, jets are fully adjustable. I had my first dip in my new one last night, and didn't come out for 45 minutes, after which I slept like a baby until this afternoon.
I love this tub.
Like Seinfeld once said.... "tub... is love"