I prefer trying on before buying to see how it fits and how adjustable it is for my head. Isn’t there a REI in the twin cities? If so and if you haven’t already looked there you might want to. For online shopping Competitive Cyclist will send a prepaid return label for $6.99. Colorado Cyclist does the same. With REI you can order on line and return it to a store for free. They also have free shipping on items over $50, good if you know it fits and don't need to return it.

Personally I like my brain enough to get a helmet with a mips protection system too. Even though it’s a small advantage a mips helmet can help in protecting the brain in some falls. A mips helmet can be bought for around 100 now, Giro and others.