Honestly, the best thing for you to do is to go into a running shoe store and have them do a shoe fitting. Doing that will ensure that you find the right type of shoe for your feet and your needs. This article has tips for finding the right shoe: www.sparkpeople.com/resource/fitness_artic les.asp?id=592 . However, it would still be a good idea to have a professional fitting.
I am a long-time city walker that is looking to increase my fitness level and break through a plateau by adding some running to my normal walking routine. I've started brisk walking for a block or two, then jogging for a block or two for a distance of about 2-1/2 miles (to start).
What shoes do you recommend for a new runner running on mostly flat, paved surfaces on city streets and parks?