2. Yoozoo Silicone Case
6. Speck ToughSkin

Yet another silicon case. This one has a much more aggressive textured grip and a belt attach. If you are the active type then this case will work best with your adventures.
I like preserving large purchases such as my recent acquisition of an Apple Macbook. While the Laptop is sturdy and durable I don't like the idea of the outside getting scratched or dinged from general use.
I bought a Macally Protection Shell from Amazon. I give it a five out of five for being what I expected. It's a hard, two piece case that snaps onto the outside of the Macbook. The leather finish looks excellent as well as durable. One thing I would not do is expose it to anything sharp that could cut the leather.
The bottom piece is molded so that all the ports and fans are unobstructed. Everything is very easy to access.
I have been monitoring the temperature of my Macbook with iStat and have not noticed a significant increase in heat.
The case does increase the thickness of the Macbook by half and inch and ups the weight half a pound. It really isn't that noticeable and makes me feel much better.
The case looks excellent. The black leather finish is an eye catcher and can protect your Macbook from scratches and small falls.
I purchased mine at Amazon in the New and Used section for $20.10. I consider it a great deal for the exemplary protection it provides.