I use aftermarket H4 housings and relays for all of my headlights. The hi-lows on the outside of the top pic, are Pilots that I got from JC Whitney. The Hi beams are sealed Halogens.
The 4 on the bottom pic, I got from Ebay. With the H4 bulbs in the center, I turn the connector over and don't use the center low-beam pins. With H4 bulbs, there is a huge selection of wattage and brightnesses. These have a slight blue tint.