Thanks for the reply everyone, I've kind of narrowed it down to 4 cables, but I have no idea how to test them since no one around me sells them.
At the moment I've got the Wagnus Diamond Dust (Pricey), Moon Audio Silver Dragon, Toxic Picolino, and BTG starlight.
Which one should I plunge into?
Like Mimo, I've not tried the others, but silver cables (Silver Dragon, Picollino) will sound quite different from copper/hybrid (Diamond Dust, Starlight). It will really be a plunge of blind faith if you make a decision without trying or knowing the type of sound you prefer. If you are unable to test these exact cables, perhaps you can try some silver and copper/hybrid ones and see what type of sound suits the music you listen to more before deciding.