If you just want to replace the stock bulbs, Sylvania XtraVision or Philips Hi-Visibility are your best bets for more light on the road. Both are available at many auto parts stores, and even walmart has the XtraVisions and kmart has the Hi-Visibility ones.
Bulbs like the Silverstars, PIAA, and other superwhites are more cosmetic if you want a blueish light or the "HID look", but they actually put out less light from the bulb, only last a year or so, and cost a ton more.