I've been very happy with these:
http://store.candlepower.com/osraulhiouh7.html
They run 10 watts more than stock, but put out almost 50% more light. It's not HID brightness, but I don't get sad when I turn on the lights anymore. They aren't white in any way, so if you're looking for a color change, these aren't the bulbs you're looking for.
The +80% bulbs aren't really 80% brighter. They put out about 1500 lumens and have a small, tighter filament that, hopefully, puts more light in the center of the hotspot and makes it appear "80%" brighter.