I found this article on the reality of running shoes and running shoe prescription. Ian Griffiths evaluates some of the assumptions about the types of running shoes and the evidence that evaluates those assumptions.
There are many running injuries every year and I personally believe that technique is more important than shoewear.
As my friends and family know, I have switched to vibram five fingers for the past 2 years (after reading Born to Run) and I think they are great. I would advise you to consider trying them, but realize they are not for all foot types or all people. If you have a very rigid foot, these shoes are probably not the best for you. You should also consider your running surface in that softer surfaces are much easier for this type of shoewear.