Hi all, I can't seem to make up my mind on which sleeve to get. I will be carrying the MBA inside my messenger bags or handbags. I want the sleeve provide enough protection, especially since it will be placed in the main large compartment along with a bunch of other stuff in there, but without being too heavy or bulky. I've narrowed it down to these 3: 1. Waterfield SleeveCase 2. Acme Made Skinny Sleeve 3. LA Robe Air Please let me know you guys' opinions on these and if you think it will be a good fit for my purpose. Thanks.