Nike Vomero. This shoe saves my life, its a show from Nike made for walking, great padding and everything. They are also extremely light and very well ventilated, which is awesome.
Everyone has a different arch and specific way their foot hits the ground, so generally I go to a store what will measure your foot and pick the perfect shoe for you. We have a local store called The Running Zone that does this. You spend more $$$ but at the same time you get a shoe that will help you avoid back and hip pain.
These things I've learned through 2 knee surgeries and 2 stage 3 herniated disks in my spine.