Buy what fits you best. (That is clearly certified and all that. I also like the new MIPS technology.) Past that it just matters what name, color, sparkle, stuff you are willing to pay extra for. If the cheapest fits the way you like then go with that. Ignore the sales person who tries to make you feel guilty for not being willing to spend more (and yes they exist, I have personally experienced it - “You are not willing to spend more to protect your own head?”).
Add me to the group that does not have a schooling helmet and a showing helmet.