Hey guys-I'm a new rider and I'm looking to start purchasing gear. I'll be doing mostly woods trails around my farm and also some riding in our gravel pit. At the moment I've got an old junky atv helmet and that's it for gear. I've got about a hundred bucks to spend right now, so I figure I can either buy a decent helmet, decent boots, or a decent chest protector. I probably won't have spare cash again for a month or so, so what is the most important thing for me to buy? Thanks!