I was very interested in water birth too but unfortunately the only way to do one here is to do a home birth. They don't allow it in the hospitals in Ontario for some reason. I have a midwife but I will be delivering at a hospital. Something I've come across that seems really great is the Bradley Method. I got a book from my library about it and it seems great and makes a lot of sense. I suggest you look it up...it's something that I bet you'd like too.
With a water-birth your probably going to have to use a midwife. Most hospitals 99.9% of them do not have the means to do water birthing, nor do they really allow it.
And with using a midwife, most insurance these days will not cover the birth unless it is done in a hospital. I know my old insurance when I was married, did not allow home births or midwives to deliver the baby. I am now on state insurance, and they too won't pay for it.