Hi guys! I'm a brand-spankin'-new learner, and I'm looking at buying a helmet. Unfortunately, I'm a chick with a REALLY small head, so I need S/XS. I can't seem to find any helmets that fit well but don't cost over $400. Can I get away with a helmet for under this price that is going to save my head from being smashed on the bitumen, or am I better off sucking it up and paying a lot of $$$? (if I CAN get away with a cheaper helmet, can someone tell me what brand/make, and if you're in SA where I can get one) Thanks!