I had the Belkin Grip Vue on my iPad 1, with a screen protector. I've dropped the iPad a few times from the tabletop to wood/tile floors. The case got banged up, but the iPad is fine.
At the moment, my iPad 2 is naked except for having a Smart Cover on. While I like the Smart Cover as a stand, for protection against drops, I'd feel a LOT safer if I had it in a Grip Vue. My ideal case would be a Grip Vue like case that somehow accomodated the Smart Cover, but so far, I haven't seen anything that's like that. 🙁