I've just bought a set of the 159 Lusso 17" alloys as winter wheels. Atlas 4 season tyres on order (four for under £200) - an unknown brand except Autobild did a review on Atlas Green summer tyres and surprisingly they came out in the top 10. Thought I'd give the 4S tyres a try as my TI is the Q4 4 wheel drive variant.
When I ran them on mine, I fitted a 3mm spacer at the front. I don't know if it was absolutely necessary (I didn't risk finding out) but the painted Ti callipers did seem to be perilously close to the rear of the wheel spokes (certainly a few microns closer than they were on my previous Lusso with unpainted Brembos) so I went down the 'better safe than having callipers to repaint' route.