Halogen bulbs require a mirror reflector to allow the ligh to be thrown out of the headlight. Most reflectors have specific angles and positions of mirrors to get the most amount of light thrown. LED bulbs tend to output their light in different directions/angles (rather, in all directions) when compared to halogen, in regards to the location of the "filament" of the bulb. As a result, most LED bulbs in a halogen reflector will improve your visibility, but at the very high cost of a "dirty"/smudged light output being very unfocused light, and the LED light will be blinding to any one else looking at the front of the car.
Without changing your headlight housing, stick with a higher output halogen bulb, or if you want the benefits of LED, its significantly better to upgrade the headlight housing as well to accommodate the LED bulb by using a projector or a reflector specifically to suit LEDs.
Osram and Philips are my go-to manufacturers of bulbs. Pricey, but they do the job.