Do you have small (younger than 15) children? I say this because we had a wood floor in the kitchen (where there is water but not in the amounts that one will find in a bathroom) and the planks directly under the sink and the water fountain were ruined within the first two years. we tried everything from constant vigilence to covering the floor completely (biggest mistake). We simply couldn't keep the water off of the floor enough to maintain it's beauty. I can imagine that when the shower splashes consistently or when a wet towel finds it's way onto the floor enough times you may regret the decision ot put wood in a bath.

Just my .02