I gatta say, I'm more than satisfied with my Zildjian's. I've been jumping back in forth between Zildjian and Sabian for the past few years and I always jump back into the Zildjian's. Mind you, I still love my sabians, but I favor my Zildjian's more due to the sound, quality, and appearance. I'm yet to try any Paiste cymbals. All I ever hear is great stuff about them tho. I think I'm afraid of trying them, I don't wanna open the wallet up again for ANOTHER cymbal setup LOL.
I bought an older 22" Paiste Power Ride, and was surprised how clean and focused it sounded compared to my Zildjians.
So, I went and bought a newer 20" Signature Full Ride, and it sounds remarkably similar - clean and focused, just in a slightly different frequency range. Now they both seem to sound too clean and focused. LOL They provide a nice contrast to the Zildjians, but I won't be buying any more of them.
Zildjians seem to have more variety and character to me. I've only got a couple Sabians, but the ones I have cover similar ground that Zildjians already have taken care of for me.