For about 2 months I have been shopping for a pair of Vittoria Open Corsa EVO CX 320tpi tires, they had to be red or black (first choice was red). Most merchants didn't have them in stock, those that did wanted an arm + leg. Finally cbike got a pair of blacks in stock and offered them at a very good price so I picked them up. Today I mounted them up on the Tarmac and tried them. They are replacing a pair of slightly used Gatorskins which I will keep in stock for my Simoncini.
I took them for a 28 mile spin with a 1200' climb just to see how they do in varied terrain. I started out over some really nasty streets in Schenectady, they road well. I tried them on a stretch of windy bike path, they handled well. I tried them on some smooth flats, they spun up easily and my perception was the bike seemed a little easier to push (although not scientific by any means). They climbed well, had good traction and the high speed descent was rock solid.
All in all - a good tire although I hear they will wear out quickly. That's OK - the Tarmac is getting set up as my club ride & hill climb bike. My Simoncini will take on the roll of morning training rider and century rider, it will keep the Gatorskins until it's current set + the three I have in stock are all worn out, then depending on how the Vittorias actually do wear for me, I will see what it gets.