I have just picked up a Nolan N104 and the noise levels are about the same as those on the Shoei Raid II that I have just 'retired'. (I always wear earplugs regardless of the journey length.) You will find that different helmets perform differently depending on the bike that you are using. I will be using the Nolan primarily on my R1200RT. On that bike the screen when lowered directed air straight at the vent on top of my Shoei - making it very noisy. The Nolan has a different design and is therefore much quieter in the same circumstances. However, the Shoei was fine on my FZS1000 in full airflow.
Unfortunately, you often have to try a lid out in the real world before knowing for sure.