We just traded 2 2009 9670sts for 2 2010 9670sts. Some things I would watch from experiance with the 2009's. Upper chopper belt, I had one blow in tough straw, turns out they offer a heavier belt I the part think the part # starts with HXE, hoping the 2010's will have this belt from factory. I would consider adding the new concave motor support if not on the 2010's, a $33 upgrade to protect a $300 concave motor. Also if harvesting any small seeded crops the updated small grain moisture plunger drain chutes to prevent plunger stalling(likely still not included from factory). Other than that, good combines nice balance of power to capacity, usually run out of power by the time the losses start to rise.