This one is very comfortable. I like the air vents when I open them I feel the air on my head It fits nice an right. I turn my head and it feels like it part of my head it doesn't move. And it's pretty light. Well worth 500 bucks
I've never really looked into the sharks, but wow they make some really cool helmets with awesome extras built in. I like the flip down visors, I had a HJC with the flip down and I loved it, but once it got broke in and I lost some weight it didn't fix as snug as I would like. I noticed that Shark even have illuminate helmets with reflexive stripes very good idea for night riding.
Arai RX-Q most comfortable helmet I have ever worn.