To find what bulbs you need, you can go to
http://www.led.net and they have a little app that tells you the bulb specs on any car. As far as the LEDs all around, I am planning on doing that too. They will be brighter and light up faster than the normal ones. Also, the lenses don't matter. As far as headlight conversions go, don't waste yout time, money and effort going from 9006 to 9005. Do the H4 conversion (those are the bulbs required for the JDM one-peice headlights) Those are very bright. Or you could go HID. I am actually planning on doing this as well but i gotta wait till I get tha cash...I just shelled out for my custom cat back, muffler and front pipe (500 bucks) so I'm a little short. I am also plaing on getting little tiney LED bulbs to fill the entire tail light (kinda like the Cadilac and the Q35 do) but thats a huge project for summer time when I have an extra pair of headlights to experement with

Good luck and lemme know how it turns out. Late