I've long been desperate for a really good laptop bag, but I'm afraid I don't have anything useful to offer. Right now I have a generic heavy-nylon job with a company logo on it; while it's ugly and cheap, it's actually a convenient design--small, light, but expandable to hold a few hardcovers if necessary. I put my laptop in a protective sleeve and slide the whole thing in. The other ones I've seen, or even bought, are typically either too large and clunky and heavy, or so small that you can barely fit in the power cord. Lately I've just been syncing my files and not bothering to carry the thing at all, except for travel.