How do you know what's quality? Is it higher quality just because it costs more? Anyone know anything about bamboo?
Depends on what you are looking at.
For laminate floors, quality is in the structure and wear layer. Cheap laminates will be thinner and less resistant to scratching.
For wood floors, quality is in the milling, and also the way that it is constructed. For a solid wood floor, larger bevels usually equal poorer milling. Some of the cheap manufacturers have latched on to this impression, and put a smaller bevel on crap material, but your height differences board to board will result in a crappy looking installation.
For engineered (multi-layer plywood, solid top layer), it's in the construction. Cheaper materials will be rotary peeled, which makes it look like plywood (repetitive grain pattern), and will also check (splits in the grain) due to the way it is made. A sawn wear layer is best there.
Bamboo is very hard, but seems to move a lot with humidity changes. You will want humidity control if you go that route.
Throw finish warranties out the window. In 17 years in flooring, I have never seen a successful claim regarding finish. They're simply there for show.
If you want to know more, send me a PM. I work for a flooring company with a showroom in Ankeny.