With that said, the s2k's are usually regarded as the best for light output. They're a small profile as are the morimotos. E46's are chosen more for their "color" which I think is dumb but they're a really good projector as well. I consider the TSX to be in between the s2k and e46 in terms of color/light output. I don't think you can go wrong with any of the above choices though, they will all be a huge improvement over stock and they're all considered to be among the best choices for retrofitting.