The Previous Rosso Corsa was purely carbon black and that's why I didn't consider them. So obviously they diversified the "MkII" with the introduction of silica in the center zones. I've done some reading and silica is excellent for wet and cold. Carbon black offers superior "hysteresis" however, which is the key factor in dry grip. I'll look into those tyres more. Thanks..
Previous Rosso Corsa was also multi compound; 2 different compounds in the rear or as the Pirelli marketing calls it 3 Zone Compound (vs the 3 different compounds or the 5 Zone Compound found on the new Rosso Corsa II rear). I went thru 2 sets of Rosso Corsas, and my main issue with the rear was that the center didn't last long, and started becoming flat after even after 1k km of commuting. The wet performance of the Rosso Corsa was nothing like the Pilot Road 4 (or even the Road 3), so had to go thru the trouble of switching over to the Pilot Road 4 tires in November 'till April or May. Pirelli seems to finally address especially the longevity of the center of the rear issue with the new Rosso Corsa II, and since it's street and track tire, I'm planning to get it soon. But only because I'm planning to do occasional track days too.
Since you're not planning to do any track days, and looking for street tires, if the dry grip of the Pilot Road 5 is anything like the Michelin rep said to MGFChapin, then I'd say it will be just an amazing year-around riding tire. The Road 4's wet performance was phenomenal, and I saw in multiple reviews that even a worn out Road 5 performs better than a brand new Road 4s. Also the profile of the Road 5 is more aggressive, with improved carcass stiffness in the rear than the Road 4. 100% silica in the front and multiple compounds in the rear, it seems like the best year-around tires better suited for your needs. So long story short, the more I think about it, you should look in to the Pilot Road 5 more. And if I can make it to Serres this month, then maybe we'll test both the Rosso Corsa II and Road 5 together both on the track and on your beautiful canyon roads around Thessaloniki ;)