I'll be lifting an 8 foot disc and a plow, but I also hope that it'll be able to lift the ten foot Brillion seeder we plant hay with. It's got two packer rolls but two cylinders. We generally use the 80, but it doesn't make the corners well, especially when we plant back and forth. I also think it's too heavy, even with duals, because a field I planted last year looked nice and smooth after I'd fitted it, but after I seeded it--which I had to go over twice in order to plant the timothy--it had wheel tracks. I think the D will be about right, with duals--if it can lift the seeder.
Personally, I don't much like that seeder. It only has one seed box, no fertilizer, and the metering is ridiculously crude and inaccurate. My little 9 hole, horse drawn Superior drill does a much better job, but it's too small for anything but tiny fields. But that's rather off topic.