Of the five race clinchers listed, which is the most satisfactory?
-Schwalbe Ultremo ZX HD
-Gommitalia Targa K
-Hutchinson Atom Comp
-Vittoria Open Corsa CX
Veloflex Pave does not exist (but no doubt very good
Schwalbe Ultremo: anything Ultremo from Schwalbe rolls well but does not last very long and borders on the downright dangerous. Not sure if they'll ever sort that compound out. (Kinda their attempt at outdoing Conti's Black Chili stuff. No cigar so far)
Gommitalia does not manufacture tyres AFAIK, most of their top tyres are made for them by Veloflex (or so I hear). Not sure where the rest comes from.
Hutchinson: No idea but I don't know a single soul actually raving about them.
Vittoria Open Corsa: a disaster recipe on anything remotely moist. Go for the SC if you do not mind the para sidewalls.
If it were for my own use:
1/ Veloflex (any Veloflex)
2/ Vittoria EVO SC (almost as good as Veloflex but probably cheaper to most people)
1/ + 2/ Are handmade, so called "Open Tubulars" meaning their tread is not vulcanized onto the casing but glued on. They are worth buying well beforehand so the glue can fully outgas and stabilize.
Veloflex uses natural rubber as opposed to synthetic rubber, which also benefits from "aging" a couple of months prior to use.
Keep in mind that none of the tyre on your wishlist are particularly reknowned for being puncture proof (for what that's worth) and only bring out their best performance when using a good quality unpigmented latex inner tube.