Got my 15" uMBP a few weeks ago, and I'm looking to get a sleeve before class starts up again in the fall. I'm a college student, and most days I'll (hopefully) be biking to class, so I want my >$2k investment to have a good deal of protection. I have a North Face Hot Shot backpack that has a (very) slightly padded pocket for a laptop/hydration pack, and I also have a medium Timbuk2 classic messenger bag (no laptop section). I love these two bags, so I'm looking for a sleeve to go inside of them. I'd also like to be sure that whatever sleeve I pick will be able to handle being put in a bag with potentially heavy textbooks. I had an incase sleeve on my black macbook and while I loved the simplicity, pressure (from what I assume came from textbooks) caused white bruises and indentations from the keyboard. It was a PITA to deal with and ended up hurting the resale value of the machine. This time around, I'm going to try and be smarter about it. I'm currently looking at a few options: Tom Bihn brain cell - Obviously the most protective of the three options. Is this case too big to be comfortably placed in a backpack/messenger bag with other things? Be.ez LArobe sleeve - My girlfriend has this and really likes it. It's made of a memory-foam type material... would this be able to offer enough protection? STM glove - Heard good things about STM from Macrumors. Seems simple enough... but will it offer enough protection? I'm also thinking about getting a Shaggymac keyboard/screen protector (one of those microfiber rectangles) to serve as a barrier between the keyboard and screen. Is this a good idea considering the above options? Unnecessary? Thanks!