There are several advantages to going with quality raw wood furniture, including the beauty of the natural grain, the uniqueness of each individual piece, and all the possibilities of finishing in colors that will compliment any decor. Unfinished bar stools are like a blank canvas - there are no limits on what you can make of them.
Uncertain of what stool height to purchase, a good rule of thumb is the 12" rule. Allow yourself 12 inches of clearance between counter/bar and stool.