@tlh28 - most brands of speaker do not require a specific TYPE/BRAND of speaker cable - with the exception of perhaps electrostatic speakers and Horn Speakers.
The amp driving them on the other hand can be a whole different kettle of fish...
- high current solid state designs require low capacitance speaker cables
- whereas tube amps are perfectly happy with high capacitance cables or low capacitance cables
To get the most out of your Spendor speakers I would recomend either Audio Envy or Zavfino cables.
Both offer
- excellent dynamic performance and they have a lower noise floor than most other brands of cable, which improves imaging
- good value for money
- works well with both types of amp
Regards - Steve