HELP! I want to get HID’s for my mazda 6 but i do not know which ones to purchase!?

HELP! I want to get HID\’s for my mazda 6 but i do not know which ones to purchase!?

Every site i see has different stuff like H1 bulbs and hid conversion kits and H4 bulbs and xenons and i do not know the difference! I want something relatively cheap but i want it to look good. No ricer but a bright white with blue not strictly a blue color. Help would be great thanksss
I was going to order the 6000k from hidxenonheadlights.com but i do not feel they are a reliable source to purchase from.