My personal recommendation are the Ring Sportz Blue bulbs. They are great and give out a white/blue light and look very similar to Xenon light from a distance. In my Orion, its what I am using....Over the years I have tried lots of different bulbs as I don't like the idea of HID's in non-projector headlights...Halfords, Night breakers, Cheap eBay bulbs, and I keep going back to the Sportz Blue

One thing I would recommend though is you should definitely put additional relays in the wiring system...that alone should give a considerable increase in light output!