Wire is a system thing. You can never have too much silver in the signal path. Go without food or clothes, but buy lots of records and wire your hi-fi in silver. Audio Note or Kimber silver wire are my first choices for internal wiring of this amp. If you can't afford this stuff, just use Carol PVC hook up wire.
Nothing is worse than silver-plated copper.
Stay away from all Teflon coated wire if you are looking for relaxed natural sound. Believe me the Carol PVC stuff is good for everything in your system from the tonearm to the speaker. If you can't afford silver, and you trust me, try it. Use the Tango XE-20S or the Audio Note outputs. You will lose some of the refinement but none of the naturalness.