Nike, its more popular
Apart from Nike you have Puma and Adidas.
Nike is a huge one. Nike shoes were named after the Goddess of Victory, Nike.
Nike. Jordan.airmaxes.addidas. Etc
It's answer is completely dependent on the wearer. Both of these are the leading brands in this field and and sponsor the biggest and best in the game. Try both out and see which one suits you the best. Nike tends to have more range.
There are so many brands at Foot Locker. To name a few, Nike, Adidas, Puma, Reebox, New Balance, etc. I am not covering all of them but they have a wide selection and wide price range.
Nike IPod accessories are sold at many stores across the country such as best buy, Nike, Fry's electronics and even Kroger. They have a wide range of products and prices from head bands to iPod wrist holders.
Nike is one of the best brands on the market, I would assume it is a safe bet.
Nike. Jordan.airmaxes.addidas. Etc
Nike and Adidas
Nike is one of the most recognized brands globally and the leader in athletic shoes. Number of Nike stores globally, 700.
The prices completely depend on what brand you are looking for, cheaper brands will obviously cost less than expensive Nike's and other such brands. So to answer your question the prices you will find will range from cheap to expensive.