Exactpower EP-15A for my system?

I currently have a system consisting of a Audio Aero Prima DAC, Marantz SACD player, Pass 250.5 amp, Apple Powerbook, and 2 hard drives. Currently I have a Chang Lightpeed conditioner (2 years ago model that retailed for $399). Would the Exactpower be a significant improvment for my system, do you think? Thanks,
Absolutely, I have both Exact Power EP-15A AND SP-15A in my system, which became the foundation of the system.
Do you need both or could I plug everything into the EP15A?