Reccomended HID kits?

I don't want to get something cheap if it's just going to be ****.

I've seen kits for as low as £15 on eBay, is it best to avoid these ?

I want some with ceramic or metal bulb base, I've heard these will be longer lasting.

What set do you have and would you get another ?
 
In a previous car I had a premium set from Xenons online and that was good, came with 2 year warranty too.