This is the point I am making, not everyone can benifit from better/more cushioning, infact, going to a lighter, less cushioned, less supported shoe could be very benificial for some people.
You can cause just as much damage running in a shoe that is over cushioned and or overly supportive, infact, theres a school of thought that says running in cushioned shoes lets you heel-strike, when infact you should be mid/fore foot striking.
Bottomline, if you are going to be doing any length of running, get to a specialist running shop, or sports pediotrist and get your gait analysised and get something that suits you.