I had the Booq Boa XM for my MacBook. It's a great backpack, the materials and craftsmanship are as good as any other backpack I've seen, but it just looked too serious for me. I didn't really like the shape of it either. It looked more... square than I would've liked.
I ended up selling the Booq bag and getting an STM Evolution. It's a little more casual, and it's got a built-in MacBook or MacBook pro specific sleeve. When the sleeve is closed, it's hard to tell that there's a computer in the bag, and it just looks like a normal backpack, which I liked.
i appreciate the replies. i went down to the apple store and bought the INCASE sleeve for the mean time. it works pretty good for now. the guy at the store showed me a bag they had on the apple website that has a rain cover built in the bag, which is pretty great.