I've got 2 cents for ya. If you do not have projects in your headlamps you will blind on-coming traffic with HID bulbs.
HIDs are not instant on, they typically take several seconds to come up to full output albeit you can find instant on technology but the bulb life shortens. Also using HIDs in the high beams you will loose flash-to-pass because of the start up time.
If you do put HIDs in your fog lights, consider a Kelvin temperature under 3000 so you get than cut-throught-the-fog ability.
If you have a Sport trim or higher, then you should have projectors. Look for a HID kit that has loading resistors and a relay harness to prevent bulb-out messages. Google "can-bus HID kits" even though bulb out detection has absolutely nothing to do with the vehicle's CAN-buses.