Nothing wrong with the stock lighting. I've read that HID give off better lighting than Halogens, that's the main reason why I want to upgrade.
Well that depends on the projectors ability to harness the extra light output of HID's. From what I've seen of 2011+ HL users with HIDs, I think the general review is that it puts out a little more light, but the beam isn't quiet as good halogen bulbs (if you search a little there are a few pics, the beam tends to curve a little bit, it doesn't stay flat). Fact is, if you want true HID performance, you need to retrofit the headlight with a HID projector, but that is not easy and expensive. PnP will give you a "taste" of a proper HID setup.
I'm not after the blue light, I think the white one is more useful to me.
Then you will probably want 4300k bulbs. Its the OEM color. Its a slightly yellow white. 5K is another option, its a slightly blue white. Anything above and it turns blue then purple then if you go high enough pink (there is a Honda Ridgeline around here with pink PnP's, its really sad and funny at the same time.)
So for the 2013 HL, all I need is the H11 HID (35W) and the Morimoto 35W HID Ballasts? They're just plug and play right?
H11 bulbs, 35 watt ballasts, h11 wire harness and your set.
Its not remove old bulb/insert HID bulb plug and play, but its real simple. Basically you make your battery + connection, input connection (connect your driver OEM h11 socket into the harness input, leave the passenger side hanging), then plug the harness outputs into the ballasts. I think the harness changed recently where the ground comes off the ballast plug, ground that. Then insert the HID bulbs into the headlights (after cleaning them) then plug them into the ballast and your set
(Oh and aim your headlights to the correct level afterwords)