Best shower enclosure for rental home?

[Natalya Murphy]

We just bought a house that we will occupy for about a year and then rent out for 5-6 years while my husband is in the military.  The current bathrooms have a 70s decor and need to be updated.  

Since we need to do the update, I want to put in the most durable and easy-to-clean material on the shower walls and floor.  

What would you suggest?