Upgraded headlights

Picked up and installed a Toyota H4 kit yesterday. I cut off the vinyl covering and re-spliced all the wiring. I haven't had it outside to properly aim the headlights but looks to be a significant improvement over the OEM system. Is there a better and brighter lamp that can be installed in these? I see some lamps are way more expensive than the Toyota kit. The parts guy said there should be another zero on the price for what is in the kit. lol