Istanbul makes good cymbals, and they're much cheaper than Sabian or Z's. They are a little too thin for me though...I'd break them in a couple of months. That should be a nice cymbal if you're looking for a bright sound with fast decay.
I don't know about traditionals, but I've used an Alchemy rock splash 8' and it sounded great. Very bright and cutting. Broke it after a few years of hard rock/metal bashing. Since Alchemy and Agop are the same manufacturer, you will be satisfied with the quality of the sound. The problem is- what sound are you looking for?