There are a lot of fine helmets out there, and fit is key. Doesn't matter how quiet it is, how "cooling" it is, or how "cool" it looks - if it doesn't fit, you'll not be happy with whatever you buy.
That stated, try to find a shop that has a larger selection, with staff that really take the time to ensure you have a proper fit. Related: I cannot comment to other brands in this regard, but there are ways to tailor the fit somewhat in Arais, as the interior components (soft foam) are available in different thicknesses. Arais (and now other brands) have an "emergency quick release" feature that allow the helmet to be removed in an emergency (assuming you are unable), without disturbing the head or spine in doing so.
A lot of folks I know swear by the RF series by Shoei, and in my experience it's decently quiet, and let's be honest, unless you really have the knack of swapping shields on an Arai, the Shoei system is much easier to use. The Arai RX-Qs that I prefer, work well for me, and is certainly quieter than the Corsair-V. I wouldn't think twice about using an RX-Q for track days either. Again, it's about fit - this helmet fits me. I've found some Shark models to be impressively quiet (but none that I could quite get the right fit from).
I can only advise anyone - that for anything but the shortest rides/commutes - to use some sort of hearing protection. This suggestion is regardless how quiet the helmet is. If it might seem inconvenient, wait until you learn how inconvenient deafness is up the road. The sound pressure levels from wind noise alone in even the quietest helmet, will cause hearing damage long term.