Go with whichever brand fits YOUR head best.
For me, it's Shoei (street and dirt). I've had top-of-the-line Arai helmets but they just don't fit me properly w/o pressure points. I've had AGV and HJC but they're heavy.
Shoei helmets have removable liners (some models at least), the graphics are hand-laid, the helmets hand-made and they meet DOT and SNELL standards. I've crashed at the track in Shoei and swear by their quality construction. You can even send them into Shoei for free post-crash inspection. They're within ounces of weight with Arai, and in my experience they're quieter with far less wind noise than the Arai helmets I've had.
Anyway, find the one that fits you best in the price range you want with the features you need. Get SNELL approved if you can, DOT is a far lower standard.