Well, the Grayhawk comes with jacks as a standard... However we're so seldom in a campground that's out of level enough to need them ( and we didn't want the extra weight) so we got the Redhawk instead. Also, the Redhawk has a traditional water heater instead of the instant LP gas water heater. We're always using the campground electric for hot water, which is not something you can do with the tankless water heater.
We found the Class C a lot easier to maneuver and park than the Class A, so that made the decision even easier.