OK let's start with the basics of the the atrium tower. Bay lake rooms start on Floor 5 and end on Floor 11 for standard tower rooms. Floor 12 & 14(really 13) are the Club level floors.
There are 24 rooms per floor on the Bay lake side of the tower. Rooms are numbered 1 through 24 starting on the south side above Chief Mickey's. The first 2 digits of the room number determine the floor number. So the first 5th floor room is 4101.
Rooms xx10-xx16 are closest to the elevators (xx13 is the middle of the tower), and 4124 is at the north end of the hallway.
Now with some background information, I will offer my suggestions. Floors 8-10 are a good balance of height but not being too close to the enclosed tower roof just above the 11th floor for a good balance of noise levels within the tower atrium.
Dave