I have a Gravely pro walk hydro 36in with the pro steer. The pro steer is hard to get used to at first but is amazing once you get the hang of it. I highly recommend getting the pro steer option if you haven't already.
Great mower so far. I got it a few months ago and my only issue with it is that the deck doesn't go past the wheel base so its a little tricky to stripe with. My old scag used to over hang about 1-2 inches which made it much easier to stripe with.