Line Conditioners or Power Filters?????

I find both cords and conditioners helpful. If you were only going to use one, I would go with cords.

A dedicated AC line is a good idea regardless...

As Sugarbrie states, dedicated AC lines provide excellent benefits regardless of what else you do.

As for your original question, I'd recommend investigating the Foundation Research LC-1 and LC-2 dedicated and passive in-line power conditioners. Marty DeWulf of Bound for Sound reviewed these last August and claims these to be the best in the business and purchased them for his 'big rig'.

I've been using these for over two years and the benefits are tremendous, including the elimination of any negative sibilance.

BTW, they come with their own built-in power cable and cost about as much as a good power cable.

-IMO

I thank you both for your advice. I had no idea cables and connectors and conditioners made such a difference in audio
systems nor how expensive they were prior to a few weeks ago when I started shopping for components of my own.