For durability and road feel, it's hard to beat the Michelin Pro Race. I think the Vittorias you're replacing are a touch faster, but the Michelins are much more durable. I haven't used the other tires you mention, but I have not heard any good comments about the Continental Attack/Force tires. Most people I've talked to said that they corner no better than any other tire and that they feel significantly slower. I still have yet to try Veloflex.
yeah i too use the Michelin Pro Race tires, and have been happy with them not just as a race tire (for a pure race tire there are lighter tires out there) but as an allrounder. I havent got a flat to date on them, which is mostly luck.