Thanks for the tip SethK.
I've had my Arai RX-7RR4 for 21 Months now...it's the best so far in terms of ventilation and has no problems so far.
In the past I've had an Arai F-1, Arai Quantum-E, and Arai Signet GT...all were fine helmets except the Signet GT had a weak Face Shield that broke apart behind the Mechanism Cover. The Quantum-E had broke Chin Vent problem too.
I typically replace my Helmet every 5 years.
I got my Arai RX-7RR4 from Derby Cycles (
http://www.derbycycles.com/)...it was a fair price ($361.98 w/Clear & Smoke Face Shield) and was shipped promptly.
Glad to hear Arai is doing on-line sales again...I've been a loyal Arai customer for most of my riding career.