There are lots to choose from. You can look at domestic woods like oak, maple, cherry, etc. If you still can't find what you're looking for, then you can look into exotics, like jatoba, teak, jarrah, etc. Whatever you choose, make sure it fits your "lifestyle" not just "design style." Hardwoods range drastically on the janka scale (a scale that measures hardness) and that can make a huge difference if you have kids or pets.

Solid hardwood is exactly what you think it is: solid pieces of wood cut into planks. This means it can be sanded and refinished many times. However, it’s not good with moisture and can be greatly affected by humidity, so it's not recommended for below-grade basements. Engineered hardwood has a top layer of real wood glued to several layers of high-density plywood. Because of this, engineered floors hold up better to moisture and humidity which allows you to install it in more areas of the house, including below-grade basements.

Pre-finished floors are stained and finished ready to be installed out of the box. This requires you to decide before the floors are installed. What you see is what you get. Unfinished floors come in their rawest form. These floors are installed, puttied, sanded, then stained, and finished on-site according to the customer's taste. Most installers will put down a few different stains to make it easier to see the color on the actual floors and not just on the can of stain.