I'll second all the recommendations for Red Wing products. You don't necessarily have to cough up for the highest dollar items, but quality ain't cheap.
Whatever you buy, buy two pair and wear them in rotation. This goes for all everyday footwear, BTW. It's better for your feet and for the shoes.
Aside from my time as a grunt, where I first learned to take care of my feet, I spent a year working in a shoe repair shop. The third-generation cobbler and cordwainer I worked for told me that three pairs of shoes bought and worn in rotation will last as long as five pair bought, worn out, and replaced one at a time.
I also highly recommend Dr. Scholl's gel inserts for whatever shoe you buy.