The KJ750 is a great shoe for growing boys under 10.  I got these for my son who is very active and he feels very comfortable in them.  You can get cheaper shoes, but if your child runs around a couple of miles a day, then New Balance is the way to go.  This is especially true if they wide feet and need support.  The price on these is not unreasonable if you can get the size you need, wide or narrow, and the color you want them in.

For wide sizes they fit true to size.