Surprise! Geeks and models actually have something in common: they're both obsessed with finding the perfect accessory. In the world of couture fashion, a subtle or blingy accessory can complete an ensemble. The same holds true for a desktop setup; third-party accessories are a simple way to add to your system without actually gutting your computer to install extra components. We've rounded up our favorite printers, speakers, hard drives, keyboards, and mice to give your computer a much-appreciated makeover.