Sir: certainly a lot for you to wade through here, and I'll leave the JD vs K to the pundits. If you're looking at 70-90 hp and seriously looking at K, I highly recommend the Mxx40 series as mentioned by a previous post. BUT LOOK AT THE 8540 OR 9540! Advantages over the 7040? 1) Turbo 2) more pto hp 3 hyd brakes 4) heavier 5) Transmission brake (a big advantage) 5) Increased FEL and 3 pt hitch cap 6) Larger ft tires for increased FEL traction 7) available in 12 speed (aside from creeper option). The 12 speed will give you the high lift 3pt capacity to 7000+ lbs. I had the 7040 and it's an excellent tractor but too light on it's feet for my use. I went to a 8540 hyd shuttle 12speed and have never looked back. Spec out the 9540 w/cab ect (get the hyd shuttle!) and compare it with JD. I'll be there's a big price difference.
You're next jump in models would be the 95 s or x cab, but that's a big price increase. good luck bb
You're next jump in models would be the 95 s or x cab, but that's a big price increase. good luck bb