While talking about functionality, I have found no deficiencies or any room for improvement in the stock headlights. The range is excellent and better than the 02-08 corolla both on low beam and high beam. Glare is also within acceptable range. Frankly I don't think you need anything else.
People however do change to projection headlights but that is primarily because they think it looks better. For me, the looks of corolla's projectors just don't match my taste. I would suggest that if you still want some change, you can go for the smoked version of stock headlights.