I would suggest that a 60" mower is much too large for that tractor. Mowing is one of the largest power grabbers of anything you do with your tractor, esp. if you have tallish thick grasses.
I'd go with a 48" mower. You can do well with some of the economy brands as well, like Howse, King Kutter, International etc. Of course, for quality and longevity, I believe in Woods Equipment, but for the general homeowner type, the others will last quite a long time. John