Make sure you get the fog light brackets!
I say the front end, door caps, and side skirts are a no brainer. You will have to cut off two small light brackets up front and remove the "es-panels" in the rear side skirt area.
I always kind of liked the es light bar rear, so I would consider replacing the front and sides and seeing how you like it, especially if you are keeping a single outlet exhaust. I changed to a rt rear specifically because I was going to a dual exhaust. I haven't replaced my sail panels, but I temporarily painted the es ones with bumper paint. I hear replacing the sail panels can be kind of a pain and I think the es trim doesn't look too bad painted black on a black car.
For the rear, I drilled out all the spot welds for the bumper cover bracket, bolted the bracket to the rt bumper, marked the new position on the car and welded it up. I sprayed a little paint over all of that to prevent rust and I filled any extra holes with seam sealer. I left all the rear wiring the same and cut an extra light hole in each rt light to accommodate the three bulbs. I haven't checked to see how bright the turn signals are in the rear.
