Sunglasses

I live in a very sunny area, so I need to protect my eyes. I'm thinking of getting a pair of racing glasses from

My possible future sunglasses!!!

XX2i Optics. They look like a store for me, because they have a life time warranty, and 365 day trial! I'm pretty clumsy, so the lifetime warranty will definitely be helpful for me. I also can't decide whether to get rimmed or non-rimmed, so I'm happy with the return policy. Do you have sport sunglasses? If so, do you wear them often, and are they worth it?
Thanks!!!
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Sophia