Which top of the line cymbals should i get?

you could stick with zildjian (its best to have all the same brand of cymbals) and just upgrade them, you can't go wrong with an A custom medium ride (heavy sound, but not too thick or loud) and A custom hats. If you still think that thats not heavy enough or you don't like the sound, try K custom (although i never really liked those much). Also, i personally use sabian, so sorry if any of my info is a bit off.