Zu audio Soul Supreme vs Prana Fidelity Bhava

I am looking to update  a pair of Spendor SP1 speakers.  I would like to buy a US made speaker and have been reading about Zu Audio Soul Supreme and Prana Fidelity Bhava speakers.  I have not auditioned either yet but wonder if anyone out there has heard these speakers and if so could characterize their sound.  I will be using a Leben CS600 tube amplifier.
Thanks
MP