I ran a 15' for field mowing with a 5400 Deere (60 hp rated) and I was satisfied with the power. This was not super heavy shoulda made hay mowing, just "regular" mowing. I've found that in the tall/heavy stuff, while it does eat up hp, the mower still needs a certain ammount of time on it, (slow down) that is no matter how much hp you have, you can only travel but so fast over the heavy stuff.
And as Soundguy said, heavy and mucho tongue wt. (+ 3 remotes).:thumbsup: