bigwally,
I'm sure you'd be happy in any of the rooms you mentioned, we were in 339 last October and would not have any problem being in that room again. It was on the end of that small angled block of rooms so that may help eliminate some noise. It had a king bed, but you are correct the balcony is somewhat smaller than 338 next door. I didn't have a problem with it though. We never noticed any noise from the pool either. Here are a couple of views from our room.