The tread width will make it look wider but it's really the sectional width that decides if it will fit or not. All three tires are basically the same sectional width
Firestones - 12.2 section width, tread width 9.9" with a 9.5" rim(8" rim will make it a little less)
Dunlops - 12.0 sectional width, tread width 10.2" with a 9.5" rim
Goodyear - 12.1 sectional width, tread width 11" with a 9.5" rim
So out of the three, the Goodyears will look a little wider even though there the same sectional width.
Dunlops have better wet traction and hydroplaning resistance than the Goodyears, but not as good as the Firestones
The Firestones rate highest as far as wet/dry traction, hydroplaning resistance, and snow and ice driving.
So it really depends on what you want and how your going to drive it and where.
I just replaced the junky Winston tires on my wifes Montero Sport with some Firestones and all I can say is what a difference it made. Not only is it alot quieter and the ride much smoother, it feels like your driving a car.
It also would spin the rear tire whenever I turned a corner quickly, now even in the rain it just grips and goes.
Good luck with it.
