I don't know what is meant by isolated, but idealistically, you'd want at least one dedicated line for your amp, one for digital, and one for your other analog gear. Preferably all running off the same phase/leg at the service panel.
As long as you're running new lines, you might consider purchasing some romex/house wiring that has been cryo'ed or double cryo-ed. I've had some in my garage and have not installed it yet, but I would anticipate good results. And it's a very inexpensive upgrade.
You should also consider which outlets to use.
And you may want to consider different grounding options.
I've lifted all the grounds except for the cdp which has provided a tad better sonics than floating all the grounds and than grounding just the preamp.
Before the electrician leaves the job, I'd suggest you have your electrician demonstrate for you that each outlet is in phase, grounded, and the service panel is properly labeled for the given component/outlet.
-IMO