You're about to drop a couple grand or more on a laptop, and the last thing you want to do is spend even more money on a carrying case. So, you save a few bucks by going with the manufacturer's basic case.But basic bags often lack a padded shoulder strap or internal pockets. You'll be kicking yourself soon when your nine-pound load is cutting a groove into your shoulder and all of your peripherals come tumbling out of your bag in a tangled mess. Dig into your wallet for a sturdy, comfortable carrying case, and your shoulder will thank you. Look for padded shoulder straps, reinforced corners, and specialized compartments designed to hold the AC adapter, the extra batteries, and so on.