We ran 9610s in 2000 and STS's in 2001. We have worked on both of them a lot. On the 9610s more before harvest to be prepared, on the STS all summer long, because we had to. If I would be a farmer and had to have a green combine, I choose the 9610. It simply lasts longer. If you'd like my four page report on the STS, email me. Even if you don't like to hear it, I ran CASE for a year, too and overhauled them in 99. I still prefer them over the STS.