These are just some of the possibilities of exotics. Exotics are usually harder than domestics. Samples are available. Samples are available in all wood types and dimensions ranging from 1 ½" +.Most species are available in both prefinished and unfinished, and many of them are also available in engineered, allowing them to be installed over nearly any subfloor including concrete!
Brazilian Teak- Cumaru
Check out the hardness of the wood type you are contemplating. It is important to choose a material that is hard and able to withstand high traffic. It also important to choose a material that is able to expand and contract with the seasonal changes of the Midwest. The reason Oak is so popular is because it has a fairly stable a janka rating; hard, but able to move well with the climate changes. Keeping a stable environment in your space helps prevent the expansion and contraction that will happen with any wood type.
My wife and I would like to express our appreciation for the professionalism, craftsmanship and neatness of the work John and Kevin have done on our refinishing project. We are highly pleased with your work.