I think you need to set a price and a type to help with the recommendations. I have a long narrow skull and tried every helment on within a 50 mile radius of Portland, OR (literally). You name it, I've tried it and nothing I tried was as comfortable as the Arai Profile, which is designed for a long narrow skull.
Arai has a great reputation, good warranty (they replace broken parts, no questions asked), the Profile is pretty quiet (stock VN750 exhaust and no ear plugs needed), very comfortable and very, very light. However, Arai Profiles retail for $500+, but you can get them for under $300 by buying last years graphic (I paid $279 delivered). However, I've heard people cringe when I tell they I spent almost $300 for a helmet, even for an Arai.
So, if you have a long narrow skull, the Arai Profile is a pretty good investment, just buy last years model.
Chris Glennon - Portland, OR