Power Conditioners

I'm looking at the Audioquest Powerquest3 and the Austere 7 Series Power. At this price point are the power conditioner sections a gimmick or can they have a meaningful impact. Is there a certain price, brand or tech which is generally the gold standard? Is power conditioning something you should only need to address if it's an actual problem (you can hear it) across your system or is it a best practice no matter and if so who is the "value" player in the space? I cringe at the thought of spending 4k on a power conditioner. Thanks for your comments.