Sportline is supposed to be 45-50mm drop I think you may struggle with that if you have the car loaded. The camber increases as the suspension goes down so will give the tyre a bit more clearance but it does look like it would possibly foul.
As said above going for a narrower tyre will help but if you have good tyres on the car at the moment you would want to keep them.
You could go for a lower drop as the tyre will be closer to the arch the gap looks smaller, well it does to me anyway.
The Pro kit is supposedly 25-30mm or try some Eibach springs.
Fitted them to my SE, Theres some pictures in the build thread.
Alternatively a set of coilovers will give you the option to set the ride height to what ever level you want. A decent set won't be much different to the cost of the Bilsteins.
Karl.