I'm going to be buying a new vest sometime in the next few months as well (I used to always just wear my trainer's at events), but I haven't started looking yet, so I can't give any specific suggestions. However, I would 100% say that you need to get something certified. Tipperary vests are not certified. Charles Owens vests are. I believe a normal vest is required underneath of an air vest if you want to compete. Even if it's not required that you wear a certified vest in your event (it's been a few years since I've competed, so I can't remember), I'd be willing to bet that it will soon be a requirement, if it's not already. And really, what is the point of buying an expensive piece of safety equipment if it doesn't even meet the standards that were created to keep you as safe as possible?