Basically, any helmet in a reputable store will meet the same certification standard(s), so they all should provide the same level of protection.  Comfort is important, and most helmets are adjustable over a fairly wide range.
One important variable is color.  I would not recommend a dark color.  Based on my riding, and from observations from behind the wheel while driving, a bright or white color makes the rider much more conspicuous, while a black helmet obscures your presence.  I like red a lot, but it fades to black in reduced visibility.
So flaunt the color of purity when you ride.  It fits, right??
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Geezer in Chief