You're on the wrong site if you're thinking about 'sound quality' of cables, as if they're properly specified for the job, they'll do it without adding, altering or taking anything away!
In the UK, I use Van Damme for interconnects and also rate Mogami extremely highly! Sonic difference is in the looks and cachet of the two brands, the former regarded as too cheap to be really good and the latter being favoured on UK forums as well as pro circles for many years... There's a UK source here selling well put together Van Damme RCA interconnects for under twenty quid typically and they supplied for a tenner the pair, some 25cm terminated lengths I wanted. I've also been known to use an Amazon Basics RCA and RCA - 3.5mm interconnect to advantage... My ears definitely ain't all they were (and then some, sadly), but I feel I can still hear recording and production differences easily, so feel the cables aren't getting in the way at all, whatever the price or appearance (SO many audiophiles 'listen' and judge with their eyes it baffles me!).
Speaker cables can be a right bloody rip off. The wire that broke the spell for me years ago being the Linn K10, which worked 'and sounded' great with plenty of other amps and speakers. The very same cable, it seems, can be got cheap from Amazon UK as 'Kabeldirekt' in the 2.5mm gauge. I have twin 5m runs of the 1.5mm gauge for use with a vintage micro system I was given and it's great to use with bright clean copper! For use in a more powerful system, the 2.5mm and especially the 4mm type should be all you'd need.
Be warned about subjectivist forum opinions, as price tags, looks and brand-cachet rule more than any sonic qualities I discovered after many years, not that they'd agree of course

I once had a Krell power amp and had to sell it due to heat reasons in the only space I could house it. The entire time I had it, I was constantly wondering if my basically transparent preamp was 'good enough' and the wires used 'posh enough,' despite their good quality of ingredients and characteristics (which judge all cables) being fine for purpose.
In the US, I gather Blue-Jeans cables are well chosen and good quality regardless of selling price or appearance.
The above ain't what audiophiles like to hear and I have to say that in my case, I thank the good Lord that I'm off that treadmill now.