My current collection includes a Schuberth Concept, Arai Quantum F, and a Shoei RF900. (The Shoei has been replaced by the RF1000, Quantum f by Quantum 2.) The Shoei is quietest, followed closely by the Arai. I wore the Concept on the road once and won't wear it again. The loudest helmet I've ever worn.

BTW -

For Sale - XXL Schuberth Concept in dark blue metallic. Worn for less than 1 hour. $325 and I'll pay shipping in US.

e-mail to - gourmet_06484@*nospam*yahoo.com

Jon