I love the Rosso Corsa, as an all around tyre, with enough to center longevity for my commute, but also with enough side grip for seriously rampant weekend rides and maybe an occasional track day, but it seems like you would be better served by going to an even harder center compound than the Diablo Rosso Corsa.
On the other hand, if you got three years out of that tyre, then maybe it would be fine and last yu another three years. The Metzeler is also getting great reviews, so maybe try that.
Cheers.