IMHO Never hurts to have one in any system.
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I bought a PS Audio Premiere Power Plant, used, about a grand. The improvement it made in my stereo was unexpected, and I have dedicated lines. I bought another for my theater and again, I got improved picture and better separation from my surrounds. So, I really believe in these things. I even had to turn down the setting on my Darbee, a terrific product in its own right. You have a lot of things to power, and the PPP can handle ten at most. I was using Pure devices but they were really killing the sound of everything plugged into them. Whatever you decide, compare the strip to the wall. If the strip isn't better, don't use it!
Yes, I would think any licensed electrician could do it, however it would be best to search the forums for this and even post your questions, as you need to tell him some details. IMHO, I would run at least 2(1 for analog and 1 for digital), same phase at the box, 10 gauge wire, 20 amp breakers, and 20 amp outlets that are not nickel plated.
Good advice from Tls49. If you are in a house, 2 lines would be easy and recommended. BTW, "dedicated line" means your system would be separated from the rest of the electrical and have it's own breakers. No more interference from sharing AC with the lights, fridge, etc.
If not able to run a line, the right PC would improve the sonics of a system and would provide a lower noise floor. Research the archives, lots of info.