The previous poster is right on target in that you are likely going to open up a huge can of discussion here, the vast majority of which has already been posted on another thread. In fact, it's kind of obvious you posted this without really doing a search, so expect people to point you in other directions.
I will tell you from personal experience, I have tried a kit from DDM Tuning, Kensun and most recently, The Retrofit Source.
My opinion is that DDM Tuning is worthless overseas junk. I had major issues with the quality of the bulb and the light pattern.
Kenson I was pleased with, but they, or at least my kit, wired directly from the bulb source and sporadically I would have one light not kick on until I manually turned the knob off and back on.
The Retrofit Source, again, my opinion, is hands down the best of any kit I have seen for this vehicle and/or my last two where I also did HID kits. The entire kit airs on the side of high quality components, wiring, connectors, etc. I liked them so much that I just went back and spent the same money again to get new LED fog lights.
Since I have owned them and daylight savings time is changing, I am getting in more night driving and I have to say I am extremely pleased. It is a night and day difference over previous kits and I would not hesitate recommending them to anyone.
