I will almost always pick VCA over cartier or tiffanys because I prefer the motifs, but sweets as a necklace are quite small (exception for the pave) and the vintage in general is a better size, especially as you get older. Sweet bracelets tho are great because you can easily stack with others. However, in your case I agree with others that maybe you should go to a jeweler to check out DBTY styled options. I know the desire of getting into that name brand piece. For what you are drawn toward, you can save a few at a local place (or even blue nile, etc) and whatever you have leftover you can put toward a higher priced item for later.
Hey vinotastic, thanks for the reply! Many of you suggested the option of going to a jeweler. The thing is, I live in a country where a private jeweler is almost as expensive as e.g. Cartier. The price difference is really insignificant (for similar pieces) and in this case its just more worth it to get a "big name" brand instead to someone private, since I can't save that much money from going to a jeweler. Also, local jewelry stores are almost as expensive as big name brands here (really almost no difference, sometimes their pieces are even more expensive). I think getting a diamond from blue nile or similar would just be as expensive as a big name brand in where I live (taxes+private jeweler for setting the sone). So I am afraid thats not really a considerable option in my case.