Make sure you check with Racer Wholesale BEFORE placing your order. I ordered two SA00 helmets in January and only one ever arrived they were on backorder for so long.
I ended up cancelling the order for the second helmet and re-ordering it through Jegs for like $40 more - but they were in stock.
Racer Wholesale IS a good company to deal with IMO - just make sure they HAVE what you need in stock.
BTW, SA are rated for fire protection and repeated impacts not single impacts as in M(otorcycle) helmets.