We made the same decision two years ago, just one size smaller. We had run JD conventionals for the last 25 years and were looking for a 7720_9500, or possibly a 1660_66. We farm about half the acreage you do, split the same between wheat and milo. We are in SC Kansas We found a 1989 1660 with 2200 hours and a 25' 1010 header. Incredibly well kept machine, very clean, with all the options we wanted. After looking at all of the 7720's_9500's we could find, we decided to go with the red one just because it was such a good deal. We have not been disappointed. The machine is very easy to set, and we belive that we get a better sample in the tank. Our total repair bills for the last two full seasons has been about $200.00. This is also one of the older IH motored machines that the DT466 is notoriously very good on fuel.