I have a HJC Sy-Max II and find it a little noisy. I am going to look a the Sy-Max III to see what the differences are.
However at another price point ( $600+) last night I tried on both the new Shoei Neotec and the Schuberth C3. Both helmets have the pin-lock system, the Shoei comes with the addition shield not sure about the Schuberth, both have built in Sun visors. The Shoei also has a built in chin screen that is claimed to reduce noise. Ventilation on both seemed to be much better than my Sy-Max, huge channels at the top to flow air. The Schuberth channels were much more visible than the Shoei, however the rear exit for the air in the Schuberth was built into the liner and the Shoei had an exit port in the helmet.
The Shoei was MUCH more comfortable, I found the Schuberth's linier was stiffer than I would want and though over time it would be a negative.
I now need to see how I get one for a test ride to compare noise levels.