I agree with Safetymom - I don't think there are any noisy sections. I see in your siggy that you've been to WL -- we have also, and when we visited WL during our last CBR stay, we noticed how noisy the lobby area and pool area were compared to CBR. I think one of the great things about CBR is that the rooms are kind of spread out -- making it quieter by the rooms!
Between CSR and CBR, it seems like there are lots of people who love each one and it just comes down to theming. Plus, the idea of having a built-in gratuity at the CSR food court makes me cringe. I love the CBR food court, the atmosphere and everything about it, and it's our favorite!