get one that fits your shape head. Brand is irrelevant if it does not fit securely. the ones with an adjustable cradle in the back will give you a much better fit than a really inexpensive one that only has webbing. Seeing as I go through about 1 per year, I get what ever is on sale, that has a cradle and visor, that fits my head, usually on sale at the lbs.
Irulan