dedicated electrical line

As stated above, dedicated lines - I have one for front end componentes and one for amps - will do more to improve your system than any "add on" electrical isolation components and are far cheaper than most of that stuff.
Best to talk to an electrician electrical contractor.
My advice - talk to more than one and get some prices to compare.

You should look into installing a dedicated ground as well.

Get r' done!

"You should look into installing a dedicated ground as well."

When you say "dedicated ground" do you mean a separate line back to ground (which most dedicated circuits would have anyway) or a separate ground rod?

Both . It is called an 'isolated ground'.
Quite often found on sensitive equipment in hospitals and computer rooms .
WARNING , not every electrician knows how to install an isolated ground correctly !
While dedicated lines and isolated grounds will give you maximum performance , they are only needed if you are having problems that will be alleviated by their use . Can you hear noise on your system when appliances cycle on and off such as your HVAC , refridgerator , microwave , small kitchen appliances or flourecent lights ?
Can you unplug items that are on the same circuit as your audio equipment during listening sessions ?

If you do need to run dedicated lines , do at least two 20 amp circuits , one for your analog equipment and one for digital .

Good luck .