I just went throught these same comparisons this summer and ended up with a JD4310 w/430FEL. It seemed to me that the JD 30HP range tractors blew away the NH and K units in FEL, 3pt and BH performance. At least that's what I remember. Some were equal in some areas, but the JD was tops in all catagories. I've got 50hrs on her and am extreemly please with the resutls, I've strained both the FEL and 3pt performance envelope already, and grinned because she got the jobs done at levels I don't thinkg the other tractors would have done. I have good JD and K dealers in the area.