The advantage in the Gator is that there are almost none in that small size/weight (48" & ~400 lbs), so if you need small they are about the only game in town at the moment. There are disadvantages to dealing with Gator which include some questions on recent quality and responsiveness. In my case, my new gator grapple popped off my quick attach in use. It came down to loose tolerances on the QA mounts on the grapple (my tractor's QA has no problem holding onto other attachments). They eventually sort of fixed it (sent parts, I welded them on) but I was not terribly pleased with the whole experience. Since then it has performed well. This is all over the past 2-3 months.
You have a much bigger tractor than most folks posting on this thread. MUCH bigger. It is capable of handling most regular skid steer size grapples. Something 60-66" should be easy to find, and from a number of suppliers ranging from cheap to high-end. As long as you don't go too crazy on the weight you should be in a very good position. Perhaps check with local dealers and you can find something nearby. And without the recent Gator drama or shipping hassles. That would be where I would look in your shoes. My $0.02...
-Dave