Got 4 Deeres, I lived in the cab of a 7140 for 8 summers.  I miss the magnum, when the the place I worked for bought an 8400 to replace the 7140, the 8400 still didn't have the low end grunt the magnum had.  Deere does have better hydraulic function.  I've heard the 60 series eats head gaskets and are prone to fires with the wiring harness too close to the exhaust.