I think taht PST5's would be a little better. But thats because I like
the bright glassy sound of the
Paistes. If you can, go to a near by music store or online and see what they sound like
and see if they fit your style of music.
Paiste does make metal and rock series cymbals.
But I don't think they have those kind for Pst5's. The cheapest you can go for rock cymbals
are Alphas. Pst5's are a lot sturdier too in my opinion. But, go with what sounds good to you. Cheers, and happy drumming!