I just got a Shark RSI Dual Touch Hologram in 2xl from Performance Motorsports. All I can says is WOW, this thing is the nicest helmet I've ever worn. It has a long oval shape that fits my giant nugget perfectly. I love the touch button vents, the gasket sealed visor and the push-button visor release which uses steel ball bearings to release, similar to the way air compressor fittings connect. I love the look too, it has a nice aerodynamic shape with the front vent right in the mouth, like a dirtbike helmet. Anyone with big oval head should give this thing a try. Most helmets even in 3xl fit me a little tight in the forhead and back of the head, the Shark RSI 2xl is perfect.
