I assume you guys are putting 19's on this purely for looks and also realize the consquences of putting 19's on a car.

Well, if you don't know...this will happen when you put 19's on there:

1. It'll look nice
2. More rubbing....lots more if you lower the car...definitely a lot more rubbing if you go with wider tires.
3. Loss of power...you should know this already....heavier wheels = less power

Losing power is one of the most common things that will happen....but if that's what will make you happy...more power to you. IMO....17's are the highest I would go with.