Paiste are definately not cheap. Paiste, Sabian and Zildjian are the big 3 in cymbal terms. I've got all 3 on my kit, all of them sound brilliant.
Best way to decide what you like is to try them out in a shop, then you'll get an idea of how each sounds.
its just dave says he pays upto 170 for paiste? which is definately cheap for ride cymbals, and hats.