i vote for 50s A also... we stayed there and loved it... but it really depends on what's important to you (view? quiet? pool front? convenience to food/shopping/buses? smoking? etc)... for us it was distance to food court/store/arcade/buses... we were on the fourth floor and faced the parkinglot/everything pop and it was perfect for us (we could watch the kids walk to the arcade from outside our room)...
once you know what you're looking for in a room and what your priorities are, it will be easier to decide which section works for you!