Forgive me, I didn't read thru every reply, so if this has been said already.... sorry.
More has was bailed with an "N" Series Fords than will EVER be baled afterwards. Back in the day they were everywhere, did everything and few considered them sub-standard in doing it all.
Newer tractors are faster and more powerful, few are actually heavier and WIEGHT is was really matters for stability and traction. You need a pretty high HP tractor, or loaded tires and/or accessories/FWA, etc to get heavier than an "N" models were at about 3000-4000#.