Good list, Ken.
Anyone who's worked with an old Ford 8N would add "live PTO" (PTO operates without the tractor being in gear) to it. Those who've never had the opportunity to "appreciate" tractors approaching Oliver Douglas' in age need not worry about it.
If you've got hills or seasonal wet soils (i.e. mud) go with Ag tires. I know a guy who has bought 2 new New Hollands (one smaller, with turf tires; one medium-sized, with industrial tires) in the last year who simply cannot get to some places on his hilly property when the ground is wet.
If you have the tires loaded (with calcium chloride solution), IMO you should insist on their having tubes put in first, to isolate the wheels from the CaCl.
My 4WD Ford 1720 with all four Ag tires loaded is simply wonderful for plowing snow.