If you are worried about interference, you could always build yourself a Silk Filter.
Less than $20 in parts.
I would grab one of those 19" rack mount power boards because a lot of them are made of metal, replace the cord with a double shielded power cable and fit the Silk inside.
Search for it or go to Lampizator's website.
Regardless of what you have or how much you paid, how good is the feeling when you discover that there's more to the music you've been listening to? Very tidy work. Don't stop asking questions, that next piece you find could be another door down the rabbit hole.