Airfoil cross sections should be more efficient, while flat blades are easier/cheaper to make. How much more efficient the cross section is depends on how appropriately the section is chosen. A poor choice could be worse than the flat blade.
-jeff
What software you need depends on what you have.
I have no idea what a standard fiber optic ISP is, please explain.
If you could provide more detailed information the list could be of some help.
Information like:
-what type of "workstations" are we talking about?
-What is your...
