Just thought I'd like to see opionions.
Sabian, Zildjian, Paiste, or Meinl?
I vote Sabian of course
Sabian: Very similar to Zildjian, since it was founded by a Zildjian. They have custom cymbals made for artists, but overall I think they over-buff their polished (default) cymbals, which kills the midrange complexity and makes them more susceptible to breakage due to the excess heating from the polishing (believe me, I've used many of them). They have, historically, been about 5% cheaper than Zildjian... not sure about custom cymbals however.
Zildjian: No comparison really. They innovated it and all the greats, prior to the 60's used them. They are very expensive overall, but you get what you pay for. I find them to be the most durable, for some reason.
Paiste: Powerful, somewhat shrill and cutting seems to be the overall opinion about Paiste. They have newer brands with warmer, more "traditional" sounds. But most Paiste players play Paiste not to sound like their playing Zildjians, but because they like the power and higher pitch, which made them famous. Alex Van Halen, John Bonham, Bill Bruford and Danny Carey just would not sound the same without their Paistes. I used to use them and like them very much. Because most models are sheet bronze, they tend to break easier than a similar thickness cast cymbal.
Meinl: Not a big fan. I don't really know what people see in them. They are really shrill, not very melodic or smooth and tend to have "tuned" tonalities which I can imagine would annoy the crap out of a sound engineer. When Billy Cobham switched to them in the 80's (probably because they were the only company that would endorse him at the time), his video "Drums by Design" featured them. Ugly. Not pretty at all. They are also sheet bronze.
The various Turkish cymbals are pretty good too, but not very consistent compared to Sabian or Zildjian.