The tread with, depending on tires, is around 49". It's nice to think about covering your tracks with implements, but really, most 48" implements can do that. Can one really fuss over 1/2" per side? I suppose so.
Yes, 54" implements are ideal for this size tractor, but I've not had a whole lotta luck finding common, everyday, affordable sources for 54" stuff. Just sayin'.