OK, my turn. I give more credits to the ones I see more as concept ideas (I saw the contest more as a concept+slogan rather than only a slogan... Maybe I am wrong, but there you go.)
1. Nico - Because Time Counts: the slogan might not be the better one, but I really see a concept of going beyond the already established long history of VC as a next step (although keeping some of it with more "vintage" feels to some pictures). And I liked my idea of connecting tiem as precious to life as precious. Something flexible enough that you can actually target many different groups, from sporty people to family woman/man, to busy successfull working women/men and super-achievers. The Quality of Time slogan is just a variation almost of the same concept, maybe comlimentary but could go together.
2. George - (not sure what the slogan is): but I can see the concept of not departing much from the "long history" of VC, but adding the ideas of VC as being the "best"; I would probably re-write some of the text differently (but hey, I would do that for all of mine too :-)) to try and bring more "exclusivity" ideas into the concept.
3. Radek - Time to cherish/Time of your life: Again, just like for me, the slogans can be refined more, but here you go even further in the breaking away from "long history" of VC (it is always somehow in the background) with a much more modern VC. VC is for people who live now.
Very Honourable mentions
tick-talk: the concept of rewarding one's self for success and achievement (and links to sports) is very close to what the Rolex and copycat Omega ad campaigns have done. I just think it would be difficult to beat them, they are very good at it.
And for the slogans:
Alex: perfection takes time
Doc: keeping perfect time since 1755
Timerider: elegance of time
I hope I didn't disappoint anybody... I just hope everybody had as much as me doing the contest