I am looking into upgrading my 9170 tractor for fall. I like this tractor, but would like more traction when pulling the chisel plow. Most of my ground is within a 5 mile radius, so road travel is not a big issue. I have people with Quadtracs that are impressed with them, but these cost more. I would be looking at an STX or TJ series tractor, with 375 hp or larger. Thanks.