Both fuscobal and myself have gone for the Kerscher ones.
I think fuscobal is planning on installing them at the beginning of March and I hope to be able to have them fitted sooner. I will post some pictures once I have the fenders on the car.
To answer your question, I would say a 245mm wide tire would fit with a ET 45 8 inch wide (like TD) rim.
But, I think there would be some problems fitting a 245mm wide tire on the back.