AGV AX9: the AX9 trends way more toward the dirty end of helmets, with a removable dirt-helmet beak as well as a removable visor, so you can replace that with goggles for your weekend dirt rides. At around $500 it’s on the pricier side, but think about NOT having to buy a dirt helmet separate from your street helmet. You can ride to the trails, pop the beak on and the visor off, and go tree-hunting to your heart’s content.