[JeffO]

Hi Keith, I am gearing up to do the Koa in march. Because I have dogs and a high amount of foot traffic where I plan to install I wanted very hard and the Koa fills that requirement. I went lumber liquidaters and picked out a 3/4 x 3 1/4 for $6.19/ sq ft. The 3/4 Koa can be sanded about 4 to 5 times while the engineered can only be sanded twice. The engineered is a thin laminate on top of lower cost substrate. Because of the dogs and higher traffic I expect to sand several times over the years. Bellawood is the manufacturer that I like. They also make the Koa in an engineered form for ontop of a concrete floor ( this is glued naturaly).