Another option might be to consider the Kubota F series mower or JD equal. They are pricey and a FEL is not an option. But they mow at a quick pace, big decks, available with 4 wheel drive and diesel and you can put a blade or power brush on them for snow removal. I worked at a large University and they used the JD versions for most of the mowing and snow removal on the sidewalks.
Oh man those F series look nice! They are way too expensive for what I'm looking at though...maybe in the future.