I would measure the overall width of the 72" deck and make sure that you can transport it.
There appears to be a problem with Kawasaki FX big blocks not lasting very long although I haven't noted any recent comments about them.
Years back I transported and serviced a Turf Tiger with a 72" deck in my former 8' wide cargo trailer with ramp and I had a problem getting it up the ramp between the ramp cables.
Not many machines wider than 62" here in rocky, Rooty and hilly New England.
If you deal with flat land, then a 72" deck may be good for you. Bear in mind that a blade change is a long reach both above and below the deck as you change blades frequently.
My local Scag dealer has been selling more Cheetahs in recent years along with Tiger Cats, but says that Turf Tiger sales are still strong.
Just a few thoughts!