I just looked at pics of your car it looks sweet, I see what you mean by it looks odd. Thats strange I never really found mine to look odd. I had 215/45's but I found that they looked way to thick and made my wheels look small and everytime I went over a bump or dip in the road it would rub like biatch. How much has the 215/40's affected your speedo.
Aaron
Here's a pic of my car with the 215/40's
Pic 
