Due to replace mine in the near future, was looking at importing some Michelin Pilot Super Sports from tirerack as they don't stock this particular spec/size in Australia, but I can imagine having a blowout it would be a pain waiting for a replacement so I've scrapped that idea.
I'm looking at the Michelin Pilot Sport 3s now, which sacrifice some dry for better all round/wet performance. Still apparently better dry performance than the standard fit Pirelli Rossos though.
I was also after the Michelin Pilot Super Sport. They do have our size in Aus (ozzy tyres had them on sale briefly) but it is a few months away before they have new stock. My second preference was the goodyear AS2 but they are hard to find in the correct load rating.
Ended up going with Continental SC5 for a good deal and so far I am very happy.
They are quieter then the pirellis and more comfortable. They have more traction on take off and climbing my very steep driveway and seem just as grippy if not more so in the wet and dry.
Time will tell how well they wear. They are an MO (mercedes spec) tyre as we share the same size wheel and load rating as an SLK I believe.
BTW Giuliettas's suffer much less from tram lining as all the other cars I have driven, even when quite worn (pirelli's). On this car they also wore out incredibly evenly across the tyre despite the amount of negative camber on the rear. I did rotate them fairly regularly though.