Advice on cables for Tannoy D500 powered by Sansui au-317ii

Dear all,
I am looking for cables to connect my recently acquired Tannoy D500 powered by a nice amp Sansui au-317 ii. The sound I have is very impressive, but I'm new to hi-fi and would like to test the limits of the quality that I can get with this system.
Can some of you give me advice on cables, length or other things I should keep in mind.
Thank you.
Best regards,
Nuno