The early 8010s had some issues but CIH did release updates for them, but I would think they should all be taken care of by now. Do some research on them as I can't tell you all the differences. I do remember a salesman, who actually spent time in the seat of the combines, telling us to buy an 08 or newer 8010 if I remember correctly.
With all that said we went from a 1660, to a late 1680 with long shoe and the Cummins, then to a 2388. Not sure how many acres you are planning to combine but don't knock the 2388 out of your choice either. Unhook the wastegate and turn the pump up a bit.
With that said if you are set on a 40' head then yes you would probably want to get into an 8010 or bigger.
We actually bought a CR9070 this year and run a 40' Case 2162 (FD70) on it. We don't raise corn through, instead we are wheat, beans, and sunflowers so that's why we chose the yellow one. Talking to many neighbors and a few different people, your choice to stick with the red ones for corn and soybeans is the correct decision.
Best of luck in your search.