The 54 Bit Driver Kit by iFixit covers most bases for the modern geek. Not only does it have conventional hex bits and flat head and Phillips head screwdriver bits, it also has pentalobe, JIS, torx, torx security, square, triangle, and tri-wing. All in the multitude of tiny, wee little sizes needed to open up iPhones, MacBooks, and all kinds of electronic devices requiring wee little screws.
When I worked at the Apple Store, we used a lot of iFixit tools in the Genius Room – they are nice little tools. High quality, and precision machined.