It's not the shoes (for the most part) guys. Even the most expensive shoes come with garbage inserts. MBT is the only one I've found with quality inserts/insoles.
Footbeds and SuperFeet, Sole, etc. brands make a huge difference if you already have problems. They are an orthotic, a podiatrist could make you an even better one if you want to go to that length.
First thing I do with any new shoe, rip out the garbage insert...
Btw, custom footbeds will feel good from the outset, but SuperFeet may take some time to get used to, just like sitting up straight does after years of slouching...