Thanks Gilles, and yes, I believe that all spacers require longer bolts. Could you please post some pics of your car showing the wheel to wheel well spacing from the side? I realize that you have 19" so they'll be a bit different.
RBatsch,
Hopefully I will be able to load the pictures, I installed H&R 15mm R and 10mm F spacers:
So I finally did it. 10mm front and 20mm rear from ECS Tuning. Beautifully made and they arrived in 2 days after ordering. I'm very happy with the results and wouldn't good thicker, especially in the rear...looks great IMO!