help re mains adapters

there,s been lots of talk of improving picture/sound quality with mains filters/purifiers. Does anybody have specific experience. Any good/value mains strips with filters?
i have sky+ connected to Pio 434, but would like to improve picture quality.

would mains filter help? Do I continue to use supplied mains cable from filtered strip to screen??

Thanks

 

I also have the Pioneer 434HDE and Sky+. I use an Isotek mini-sub and Isotek mains leads to all components. Unfortunately even with the Isotek in place the PQ from Sky is pretty poor, at least compared to DVD via HDMI 868

Using a 43" screen really highlights the poor bit-rates that Sky use and I am seriously considering junking Sky and tuning into Euro1080. Why should I pay over £42 per month for crap pictures...the more i watch the angrier i get

 

There was an excellent thread six months ago in the DIY forum which has unfortunately disappeared explaining why a decent mains cable would make a difference on a Sky Box. I can't remember the arguments and am not technical but I did buy a replacement mains cable for the Sky box from Mark Grant and I noticed the difference in both picture and sound quality.

I should have also bought another for the DVD player but never got around to it.

I don't know whether Mark still makes them but send him a PM and ask