Advice - HID Headlamps Kits

[lmbrosko]

First post on this site so I need a little help.

I have a 2007 4-Door Sedan and am looking to upgrade to a HID headlamp kit and am looking for some advice:

1.) Where to buy
2.) Which ones to investigate vs which ones to stay away from
3.) How long do they last
4.) How hard to install

If you have any advice / experience you can share that would be greatly appreciated.

Thank you.

[MUSKOKA800]

If you are considering adding projectors for your HID lights my findings are that the turn signal section inside the sedan's housing is too close to the factory halogen bulb location for correct fitment. :) much $ wasted trying.
I have no experience simply changing from halogen to HID lamps. Retina damage to oncoming drivers steers me away from trying. Lot's of Ricers around here blinding folks already.