Jon, if I were getting a new one looking at all the options, I would suggest getting one with a wicker or "spoiler", and also the lip at the bottom which the K-1 sport has. I always used a standard Super Shark in karting and it worked out good but in sprints and some of the faster TQ tracks, it felt like my helmet was trying to rise on me (yes it was the right size), I then bought a new Vudo and don't have that problem anymore and still use the Vudo's. I haven't ever used Bell products but I'm sure they are great quality, I've always used Simpson and have took some extremely hard hits many of times and they have held up good. Used an Impact once and didnt like how it fit or felt.