I wouldnt recommend HIDs in the high beams for a couple reasons , one its overkill if you are going to also use HIDs in the lows, two it kills you ability to flash people to signal them or whatever, if you do flash them with HIDs it will burn out the bulb quicker, as for your fog light location for the ballasts , I placed mine inside the splash guard surrounding the fogs, I have a HID and Led combo going on, I have 6000k HIDs in the lows and have 6000k 80 Watt LEDs in the High beams, I love this combo , as for the HID vs LED debate , HIDs win that one , LEDs are long lasting and are great looking but when it comes to light input most of them fail