I have the spigen capsule and liking it so far. It's very lightweight and offers minimal lay on the table design. I'm going to use this case until lifeproof comes out with theirs.
My Spigen capsule is a bit loose. I am not confident it would stay on with a drop. It is already yellowed on the clear case. If I hadn't read other reviews I would return it. Not worth the battle.
I can only tell you about the Spigen Capsule - I've had it for 8 days now and it feels loose not very snug at all. I don't think it'll provide much protection to the phone on hard surfaces.
I've ordered a Case-Mate Tough case now see how that one goes.