Ford 8830 vs agco allis 9630

We'll i have it narrowed down to two the 8830 with 5500 hrs has full powershift tires are okay the real thing steering me away is around the injectors it leaking. Also being how it's a 170 hp tractor it probably did some real work in its life. The agco has a full powershift the clutch and brakes are good a little different shifting but it will take a couple hrs in in to get use to. It's tires have seen its life so they will need to be replaced and about the only other thing that has me nervous is it has duetz engine. They are asking 17500 for ford wheels set out all oil and filters changed have not been able to talk to salesmen about injector leak as he was on vacation. The agco they want 22500 tires out serviced and delivered. I would like the ford because we have a 8870 with 5500 hrs and have done nothing to it but changed injectors and oil. But I know the agco at 136 hp will have done some work but more than likely not as much.Parts are not a problem for either dealers within 15 minutes. I'm going to leave it up to you guys over a couple forums because obviously these tractors have been around a while and someone around here has to have one.http://ift.tt/1gnYqSW http://ift.tt/1gnYqT0