I always suggest folks try a set of metatarsal domes (or "buttons") which support the metatarsal "arch" and prevent the nerves in the ball of the foot getting pinched quite as badly. They only cost about $10 per set, and the shoe store should be able to show you where to put them on the sockliner or insole. (BEHIND the ball of the foot)
A set of domes/buttons is a lot cheaper than buying pair after pair of shoes, and can make a huge difference if you already have shoes that fit but still are getting numbness from compression at the met heads.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson