We just installed 8 inch wide oak planks in our kitchen, unfinished, and plan on using tung oil based waterlux to finish it. We are not going to stain.
We have undergone amazing steps to make this floor possible, as we are replacing a carpet that was laid over a cracked cement slab. I can't wait to post the finished pics.
We chose this way because my husband is big on authenticity (I am too, I guess, he just goes way overboard!) and the engineered/laminate looked terrible when I saw it in other's homes. Plus, it was actually MORE expensive per square foot, and since we have a 220 sq ft kitchen, that was a big deal.