I've also used VH Audio's 5N solid silver in cotton wire to build a pair of interconnects (with KLEI absolute harmony plugs) and found it to be a substantial upgrade over my other interconnects.
The only things people charging you $1000s of dollars can upgrade is the precision of the cable geometry and the shielding. They probably use lower quality wire than either VH Audio or Tempo Electric too.
The only things people charging you $1000s of dollars can upgrade is the precision of the cable geometry and the shielding. They probably use lower quality wire than either VH Audio or Tempo Electric too.