I've seen many european styled civics. The rule with going that route is: Taste. No big wings, altezzas, or crazy body kits. The wheels and suspension are the biggest part. Look at some wheels that are on Audi's, VW's, BMW's, etc. Drop the car a few inches, as to eliminate the wheel gap, but don't slam it. Get some CTR headlights or do the CTR Headlight DIY, search the DIY section of the website. Keep your red/clear taillights, and go from there.

Hope that helped.

As for bodykits, just get type r front/rear lips.