All the tyres mentioned in this thread:
Ultremo ZX - extremely fast, grippy, very light. But not the strongest tyre, in particular prone to sidewall damage. I think they are brilliant but if I had just one bike it would not have them on
Michelin Pro Race 4 - I haven't tried the version "4" but the 2 and 3 are great, more durable and strong than the Ultremos but also incredibly fast and strong. If you have only used something like a Conti Ultra Gatorskin then put on some of these for summer, your bike will feel like it's had a rocket fitted on it
Vittoria Rubinos - these are cheap and strong and durable. Much more puncture resistant than the Ultremo/Pro Race but not as grippy/fast. A lot of people rate the "Pro" version as a notably good tyre
I am not trolling about the Gatorskins btw. I've used them, they are ok compromise tyres but they are nowhere near the Michelin Pro for "performance". They have good puncture resistance (if you live in a non flinty area) however.