I have the matte Speck and I dropped my uMBP from two or so feet onto the driveway. It landed on the corner, and is fine. The Incase might be good, but the Speck proved its worth.
i have a black incase on my whitebook. i really love it a lot and it looks aweseom
My thoughts on the Speck, here. I'd get the Incase.
Anyone know how much these things weigh? Say for a 15" or 13"