"I believe in keeping it simple, i.e.: the shortest signal path with the least amount of components."
Power isn't signal. There's miles & miles of wire out there before wwe tap into it... a few more feet won't hurt there... as you're about to do.
Re filtration.
Attaching a passive power line filter to the front end components with something like a PS Audio Duet or the like for 200 or less, equates to $50 for each attached item with it's four outlets. Keep one for just two years and it's costing you $2 a month. One lightening strike will make it worth it to most folks. In the meantime, the usually improved sound satisfys others.
you'll sure hear less of what you're not hearing now... and spinning gear especially will sure benefit from one, not to mention the added safety they provide for under & over current issues too.
I think one would be a step up for your system adding sonic benefits, and safety in the bargain you don't have now. you owe it to yourself to try one or two at least. They're popular little gizmos and if no benefit is descerned, it''ll sell... so you don't lose and may well like em.
Not knowing, however is simply not knowing, and that's not always beneficial.
Regardless, good luck.