HID conversion kits...

i plan on getting a 8000K HID conversion kit for my 02 accord coupe... there'z so many different brands out there i was wondering which is the best one to get and also if there is a big difference between 6000K and 8000K and how long the bulbs usually last (wether i'm better off just getting PIAA bulbs instead).... if someone could please fill me in on this it will be greatly appreciated.. thankz...