Personally I won't wear anything with a poly-xyz shell. In my unscientific testing and statistically insignificant observation they bounce like a rubber ball and break head bones where a laminate shell'd lid tends to crush and go thud. DOT and Snell testing as best I can ascertain only tests absorption of initial impact and does not test rebound forces (unfortunately neither organization publishes much about how testing is done, so this is mostly guess work).
My testing was to take an old KBC polycarbonate lid and an old fox carbon/kevlar lid and drop them both on a cement driveway. the polycarb lid bounced to about knee height, the kevlar lid didn't bounce at all. I then threw them down with some force, the polycarb lid bounced about 15' high, the fox lid bounced to about knee height.
For observation, a guy I used to ride with fell off his YZ125 on a fairly mild 3rd gear (for him) straight and bounced down the trail. Didn't look bad, but he required $25k worth of Ti to put his face backtogether. The helmet never came off, but the side of his head bounced off the inside of the helmet hard enough to break his cheakbone and push his eyesocket back into his head a bit. Didn't look fun. Can't say for sure the same would have happened with a laminated lid, but this combined with my driveway bounce test is enough that I'm not interested in doing any live testing
What size lid do you need? I've got an Arai that doesn't fit me quite right....