Running shoes that fit one person will be too narrow for someone else, too flat for someone else... you have to try them on.  I definitely recommend finding a local running store to help you out.  I need extra stability in my running shoe, and my toes need ample space to wiggle (other shoes give me blisters on the side of the widest part of my foot, and under my toes) but the Omnis are perfect, every season, right out of the box.  I've shopped at my local running store enough times to know that this is always the shoe I end up buying!  When they didn't have any in stock and I desperately needed a new pair, I ordered them online.  I already knew they were perfect for my feet.