Brian, you can break new ground with a disk harrow - it may take a couple or three passes but you will break it. Of course, if you have a plow then use it first. A pto rototiller is going to be expensive because you want it to be wider than the back wheels on the tractor. Same with the disk harrow - wider than the rear tires. I had a 28hp 4WD Ford 1700 that I pulled a 6' disk harrow with and it pulled easily. I would only consider purchasing a rototiller if you are prepping for a vegetable garden. If you will be making food plots then a disk harrow is more than adequate. Your Kubota dealer surely handles disk harrows - most of my implements are Land Pride, only because that's what the Kubota dealer handles here. Actually when I had my Ford and used the 6' disk harrow I would set my cast cement weight - 400lb - on top of it for added weight and the tractor pulled it just fine. If you start to bog down while disking - just raise up on the three point a little til you get thru the tough spot then lower it and go on about your disking.