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Well, before I (or everyone) jumps in, let us know how you will be using the MB. Are you a student? Do you not mind carrying a case in your hand? etc. This should help narrow it down.
 
I have a sleeve I put my Macbook in, before putting it in my bookbag (I'm a student). I believe it is a Tucano SecondSkin.
 
I have a sleeve I put my Macbook in, before putting it in my bookbag (I'm a student). I believe it is a Tucano SecondSkin.

i've heard good things about Tucano sleeves, but the site the Tucano site is in italian. Where do you get yours?
 
I'm a student as well and decided to go with the tom bin brain cell. My macbook fits inside like a glove and the quality is top notch. It is a bit larger than other options, but with the extra size comes protection. If you already have a bag, this is a good option. You wont have to worry about your computer getting smashed by your textbooks ect. 🙂 If you need a bag to carry books as well as your computer there are better options available. I believe that a member has started a pretty comprehensive thread on this topic
 
I would rather it have a shoulder strap, it doesn't need to be able to hold anything except the computer.
 
I really like the Waterfield Designs sleeves from www.sfbags.com. You can order with a strap if you want. I just use the sleeve and put it into whatever bag I am using -- backpack, tote bag, etc. Great customer service, too!
 
I just posted this on another thread...but I love the messenger-style bag from Manhattan Portage that I carry my Macbook in. The computer sleeve is in the center of the bag, and is very well-padded. Fits my 13" MacBook perfectly, but I believe there's a larger size for MBP. What's great is that I can travel around NYC, and it doesn't look like I'm carrying a laptop. I got the black bag, but now I wish I'd gotten it in red. 😎

http://www.manhattanportage.com/catalog/product_info.php?products_id=150
 
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