To interject an opinion on your finish question, I think Gunmetal is the way to go. Chrome is too bling, but it is all what you are looking for in the end.
For those of you with 20's and the eibach pro kit, what size tires are you using? I'm going with 20x8.5 up front and 20.x10 in the rear. What's the widest tire I can fit in the rear?