Birth is not a pathological event, and need not be treated as one.
Congratulations!  
It's nice to see someone else who doesn't view pregnancy as a sexually transmitted disease.  On the other hand I do like the 
options offered by being at a hospital.  We've found through hard-won experience that you need to tell them who's boss and once they realize it everything goes well.  
Our last son was a water birth attended by a midwife - very progressive.  But the OR was right down the hall should it be needed.