Now I am in search of what Power cords to use.Signal Cable would be a good and reasonably priced choice, IMO.
Regarding your use of the multiple outlets, I would offer the thought that while using separate dedicated lines for digital, low level analog, and amplifier components can often be a good way to go, it will certainly not always be the best way to go. There are tradeoffs that are involved, such as an increased possibility of ground loop issues if separate AC runs are used for different components. Especially if the signal connections between those components are unbalanced.
How those tradeoffs will net out is dependent on the internal grounding configuration and other aspects of the design of the particular components, and won't usually have much predictability. So I would encourage you to try different arrangements of what is plugged in where.
Regards,
-- Al