I had two sets of Philips. The first set which was the old gen kit worked awesome. I decided I wanted 6000k so I sold my 4300K and bought a new gen 6000k philips and they sucked. They worked for one week then one side wouldnt turn on at all and one side sometimes worked. I got rid of those and then got Mccullochs from
HID-SiN.com. They sell them on ebay for $50 cheaper.
I would stay with anything from 4300K-6000k, anything more and its mostly for looks. The 4300K or 5000K depending on the company are white. 6000K have a slightly blue tint sorta like BMWs.