The coffees I advise you to buy are known in the trade as specialty coffees. The opposite of specialty is commercial coffee. Specialty coffee comes as whole beans, either in one-pound bags or in bulk, and usually needs to be ground before it's brewed. Commercial coffee is typically roasted and packed in large plants, under nationally advertised brand names. Specialty coffee is usually roasted in small stores or factories, using traditional methods and technology, and is often sold where it's roasted.
Specialty coffees offer considerably more choice than commercial coffees.
Commercial coffees offer only a very limited selection of blend and roast, and little possibility of buying straight, unblended coffees. More and more consumers are buying specialty coffees and fewer and fewer are buying commercial coffees. The final, most important difference between commercial and specialty coffees is the way they taste and smell. The best commercial blended coffees are quite good. The worst are atrocious.