Here is another tip when using Zbrush. Combining Dynamic Subdivision and Crease Level can allow you to adjust how sharp your crease edges are.
I have added a quick video but here is some info to go along with it:
1. Use the Zmodeler brush to give yourself more control over the areas you wish to crease. You can use automated creasing also.
2. Hover over an edge and enter the space bar to pull up the Zmodeler brush menu.
3. You can find the Dynamic subdivision tab within "Geometry"
4. You then find the "Crease" tab below.
5. These two tabs will allow you to make adjustments without damaging the mesh.
6. Use a crease level below your dynamic subdivision level to see the crease bevel. Example: Subdivision Level 5 + Crease Level 3
7. Once you are happy with your mesh and how it looks with the creases, go back to the Dynamic Subdivision tab and click apply.