Just got back from the family's first trip to Kidani. I requested a room "close to the lobby" when I booked, and am glad I did. We stayed in room 2726, located on the second floor. It was a savannah view 1 bedroom in the third "bead" to the left of the lobby.
There seems to be enough buffer space (elevator, artwork display areas, animal viewing balcony) between the main lobby and the rooms so that the lobby noise doesn't make it's way down the hallways. I can't imagine staying far from the lobby, because the walk could be a beast especially if you don't have a car to drive to the parking lots below.
We'll definitely be staying at Kidani a lot. Great bus service to the parks, easy to get to and from Jambo house if you don't want to walk, the rooms' layouts are fantastic, and a great staff. Only down side to Kidani is the lack of a counter-service food area.