Evidently your definition of best is based on sales figures and celebrity endorsements , that doesn't make something the best in my book.
Beats products do not compare favourably against other cheaper less fashionable brands of headphones in audio quality or manufacturing durability.
You can buy headphones which sound better and last longer for considerably less money.
Now headphones from manufacturers such as Audio technica, Grado, AKG, and Beyer dynamic may not have the "street cred" associated with beats but hands down sound quality and build quality on these companies $100 cans are far superior to the very top of the range beats cans.
Now I've got nothing against greatness, and beats have done a great job of convincing a lot of people to pay over the top prices for a middle of the road product, but it's all in the marketing not the product.