Have been thinking about getting a dual sport helmet, relatively new phenomenon, looks like a motocross helmet with a visor. I can't wear regular open face MX helmets with goggles, the goggles just don't fit over my glasses very well. Could use a dual sport helmet both on the street or in the dirt with the shield open and sunglasses to protect my eyes, I like that concept.
There are 4 different manufacturers currently offering dual sport helmets in the US. The AFX FX-37DS is the least expensive one at around $100. I ordered one of these just to check it out, thought if it was halfway decent I couldn't lose. Was disappointed though, didn't fit too bad and looked cool but very thin padding and the chin strap was placed too far back and choked me, sent that one back.
My friend Dustin has the Shoei Hornet DS, very nice helmet but pushing $500 and I don't really want to spend that much for second helmet. I tried the DS on at MotoGP, excellent helmet as you would expect from Shoei and fit perfectly.
I also checked out the Arai XD-3 at MotoGP, another very nice helmet, fit well and excellent quality. Even more expensive though at $550 to over $600 depending on finish.
The one that just hit the market and has me intrigued is the new Joe Rocket RKT Hybrid helmet. It's manufactured by HJC and I've always had good luck with their helmets fitting me well. It has the features I'm looking for and best of all is available for $150. Joe Rocket RKT-Hybrid Motorcycle Helmet :: New Enough, LTD
My one concern with this type of helmet is how much the visor will catch wind and make the helmet lift, although Dustin says on his Shoei that isn't an issue under about 80mph, but when he turns his head when changing lanes he notices some pull. All of the manufacturers claim that the visors are designed to let the air under them so there's no lift issue, I don't really ride my XR on the highway much anyway so probably not that much of a concern.