Since I'm going with the JDM look, I can't get in on the GT-X wedge bulb action...
I could for my city lights, but the guys where I got my PIAAs from were right, the Plasma Ion wedge bulb is by far the best one appearance wise to mate with the GT-X. It gives them this odd but very cool irridescant look to them that HIDs can tend to have, and with the headlights off, they light up the housing bright yellow which is very JDM and pretty cool, also comes in handy in the fog, LOL! I was thinking maybe I'd pick up some more Plasma Ion bulbs for my side markers, they have standard Sylvania OE ambers in them right now. I want new markers altogether. I LOVE the VW Jetta/Golf markers, but I gotta see what kind of drilling to make them fit. I love the JDM clear S2000 markers, but they don't screw in, just clips... =\