Some folks hear tonality differences between cables and others don’t.
Before you spend a lot of money see if your dealer will loan you several different pairs to evaluate.
Or at least offer a money back guarantee.
Here in The States there is a company that makes it easy to do this online.
I had RadioShack Gold interconnects and lamp cord wire for speaker connections for years.
A low end Monster Cable speaker connect opened my ears
As your system’s resolving power and speed improves, cables become more important to get the most out of it
I’ve had Blue Jeans LC-1 ICs, lots of various levels of Morrow cables including “6” and Elite Grand Reference speaker. I now have Black Cat 32xx series throughout my system. All copper. 16 foot xlr run between preamp and bryston mono blocks.
They cleaned up the Morrow’s slightly slurred high end, added additional detail but play with a sense of ease. The background is “blacker” due to lower noise. There is no loss of speed or PRAT. And this with their second to the bottom of the line cables.
Oh, and if your system is up to it, power cables are a beautiful investment. I was strongly in the non believer camp, but putting Cardas Clear beyond on my 28’s was not a subtle improvement. It was a eyes bug open jaw dropping moment … in a good way

Do try before you buy. If it doesn’t move the needle much than just get well built jobs that maintain a solid connection.
But the most important step before you drop a bundle on cables is to get your acoustic space dialed in with absorption panels, bass traps and diffusers. Until that happens you are wasting time and money. This will, by far, give you the most bang for your buck.