I had the same experience. I brought home an AQ Niagara 5000 from Hifi Buys a couple of years back with a Hurricane power cord to replace my Furman Elite 15 Power Factor. It was expensive but very effective. I also have separate, dedicated power lines to the front end and amps. The Niagara is on the front end.
I moved the Furman power conditioner to my HT system and saw a large improvement in the TV picture. It improved the colors and sharpness. So win-win.
Funny story- last year I replaced my Sony LED TV with a Sony OLED TV. (This was after putting the Furman in the HT system.). I listed the old TV for sale and placed it in the garage. When someone came to buy the TV I plugged it directly into the wall. The picture looked dull and fuzzy to me. I started to panic thinking the TV was broken. Then I realized that’s the difference the power conditioner makes. The buyer thought the picture looked great.