Photoshop Brushes?

I'm looking for some photoshop brushes for line art (not for painting).
So any brushes that are pretty hard, as I find the standard brushes to be too fuzzy
I've looked at the more popular stuff here already, but most of it seems to be for painting and is about as fuzzy as the standard brushes.

Does anyone have suggestions?
I really loved the brushes on sai as the hardness was pretty high, so anything like that would be amazing.
(Btw I have PS CS6 if that matters)