It ain't cute 'n trendy, but its roomy, well-padded, and totally functional (icluding a nifty seperate, removable padded sleeve/envelope for just the laptop, when you don't need to lug the rest of your junk along)
THIS is my choice. I've got a couple of these - I tend to beat stuff up pretty good, and these take my punishment. Around $50-$75.00