1.) Will you need to transport it onto a trailer more than one time per year? 2.) How big are the areas you will use it on? I will tell you one thing, from my own experience, Stay away from 3-point disks. However, if your answer to my first question is yes, and/or, your answer to question to the second question is: "less than 1/2 acre areas" then a 3-point a 3-point, in a 6-7 foot width would be best, for that tractor. A pull-type disk, whether it be hydraulic lift, or the old "drag-type", will draw less horsepower, and use less fuel per unit width, allowing that tractor to handle an 8-10 foot width. IF you need to transport this type, over the road, pulled by the tractor, then make sure your disk has hydraulic lift and wheels. These are the most expensive type of disk, but are definitely worth the money, due to their superiority in every category on larger acreage. For myself, an old "drag-style" (lacks wheels or lift capability) works best on tractors of that size, or a little smaller. The plots I work are all between 1/2 and 2 acres. For several years, I used a 6 foot 3-point disk, and found myself using about twice the fuel, to get the job done, than I did prior and after, with an 8-foot drag-type. At 3.81/gal for gas, and nearly $5 for diesel, there is no way I could afford the acreage that I plant these days, if I still had that 3-point disk. Seeing it leave my place in the back of a "craigslist" customer's pickup, a few years ago, was close to the prettiest site I have ever seen on my farm. Drag-type disks are definitely the cheapest of the 3 types I have talked about, and can often be found for scrap price (or less). I have used a few different brands, and John Deere is my favorite, followed closely by Bissell. These were about the most popular brands out there, so finding them ain't much of an issue. The John Deere was a little easier to change angles on, and always left the least "center ridging". My uncle, next door, uses an 8 ft IH, that I don't particularly care for. Your tractor probably has about 32 drawbar hp, which would make it plenty big enough for an 8-ft disk (probably the most popular, and easiest to find size out there.). My 20ish hp Allis Chalmers "C" handles the 8 ft JD disk pretty good in most soil conditions, at the most aggressive setting, but definely struggles in tougher conditions. My 28 hp Ford 8n handles it well in all conditions. In real tough conditions, I use it behind my 4 wheel drive, 43 hp JD 4120, That disk is on the small side for that tractor, which never has even seemed to feel it behind. The 4WD certainly plays a big role here, and I can think of no operation that benefits more from 4WD, than pulling a disk. Untill I hear the answer to those questions, I would say, hands down, for the best performance, and least cost, you should go with an 8 foot wide, John Deere, or an 8 foot wide Bissell disk. We do have a 6 foot wide Bissell drag-type, on our other farm, where it gets used behind an 18 hp, 2wd tractor (JD "M") with unloaded ag tires, or a much newer, 20'ish hp JD 750 diesel, with turf tires. Other than a little more center ridging, that little Bissell also does a find job behind those tractors.