Jamie,
The north tower is all the way in the back. Makes for, in time; much extra walking. Especially if you come and go a lot.
I prefer the south tower. It's closer to the silver strike machine and front. I have stayed at the Vegas Club(North & South towers). Except for maybe the Fremont Experience noise. For the 4 to 6 hours that it playes in the evening. And I am not usually there anyway. I have not had any trouble with noise so far. Even when I was on the lower floors. I have not had any trouble getting to sleep in the south tower.
But, this is me,
Dan