Good HID kits

Hi all. I will be fitting a HID kit to my 2013 ER6N and I would like to know where people have bought theirs from and if it is good or not so please tell me about the quality of the kit and service you received.

I dont mind buying from ebay providing its from a good seller that will sell me the kit with right bulb. What are your opinions on 4300k or 6000k?