You could compromise and get higher wattage 9004 bulbs that are only 55/80 or 55/100watts. You won't need relays or heavier gauge wiring for that small of a upgrade. However, change the socket of the headlamp. It has a design flaw. It will melt if you use anything over 45/65watt bulb. The US version or aftermarket ones you buy at any auto stores have a open end not a receded end which, tend to melt. You'll notice a small difference but, e-code lights are the best alternative. The HID light kits will make you lose your high beam and you will still be using the original reflector on headlmap.