Could be less noisy yes but .. (08/02/2011)
I've the XL size, and it's still very light. I bought an other helmet after a crash, and I'm back on this HQ1 Carbon which I think is the best for me (didn't try Arai, but I did try Shoei).
Good quality for the inside, good ventilation, great stock screen, and profiling is great for high speed runs ... (except for noise, but it's not Arai's price :-P)
good but it could be better (04/11/2010)
a bit noisy / the screen should have more fixed positions / I expected it slightly lighter (closer to 1k grms.)