FWIW a neighbor has ran Lexion's for 6 years, had two 570Rs and then a 740 or whatever the class VII on tires is and now there is a 8120 sitting in their shed.  They like the Lexion's capacity in corn and fuel usage is great on it but reliability hasn't been that good.  They are willing to give up a little bit of capacity to go back to a simpler combine and actually be able to keep it running in the field.