Just got my MBP yesterday and I'm wondering whether I should get a sleeve or a hard case. I think I would rather have the hard case so I don't have to continually be putting it on (like if I had a sleeve), but I'm concerned that it may scratch my MBP. In addition, I feel that when I put it into my backpack it would still be prone to getting dust and other random crap in the ports. So I'm stuck choosing between both of these options, what do you guys think? Also for the hard cases what is the best brand? I heard Incase from some and Speck from others.