Just spent an hour or so looking at four helmets in the $800 range at Lane Automotive just south of GingerMan Raceway. I didn't include the Bell M.8 Carbon because it's on back order. Also didn't include the G-Force CF3 or the Zamp RZ-44C because I wanted to choose a helmet company with lots of history and a solid reputation in the pro paddock even though I am an amateur. Just my choice so don't be offended if you went with one of those. All helmets are pre-drilled for a Head and Neck Restraint. Three of the helmets fit me in the XL size, but one fit me best in L. It's critical that you try one on to see what fits you best.
- Arai GP-5W. Size XL. Wide eye port, lots of venting, composite shell, removable/replaceable cheek pads. Very comfortable and soft interior. Composite. Color-white. I measured the weight of XL to be 3.8 lbs.
- Impact Draft TS. Wide eye port, lots of venting, composite shell, removable/replaceable cheek pads. Very comfortable, but felt the heaviest. Made in the USA. Composite. Color-silver. I didn't weigh this one, but should have.
- Simpson Carbon Fiber Devil Ray. Only 2 vents in the front of the helmet, eye port a little smaller, removable/replaceable cheek pads. Carbon fiber. Comes with a nice helmet bag. I measured the weight of the L to be 3.3 lbs.
- Stilo ST5 GT Composite. Probably had the most features. Spot/indentation for microphone, side ports for drink tube, radio communications, and some pretty cool ear piece options. Also seemed like it extended lower below my chin and had a unique strap system on the visor shield. Color-silver. I measured the weight of the XL to be 3.7 lbs.
I felt comfortable in all four helmets and each one had slightly different pressure points on my head. I like the features of the Stilo, but the extra cost of the Stilo and ultimately the lower weight of the Simpson Carbon Fiber Devil Ray proved to be the deciding factor. Your prices may vary, but listing them from most expensive to least expensive was: Stilo, Simpson, Arai, Impact.
Winding Road Racing did a nice review on SA2015 helmets here: http://www.windingro...racing-helmets/
Hope this helps.