attention runners
I have worked in the shoe industry for along time and the best advise that I could give you is to change your shoes every 400-500 miles!!!! This is what the shoe companies say is the best, and it is. Next, you have to go to a Running Shop, not your local sporting good store, or on-line store. You say that you love Nike, which is great, but whith out having a trained professional look at your foot strike you will most likely buy the wrong shoe. Every shoe company makes a type of shoe what COULD work for you. But I know for a fact that not every nike shoe is the rigtht shoe for you, infact only one or two shoes, from each brand will be the right shoe for you.
Good luck