@kw6 - Fortunately you have a tube amp, so you will (most probably) not be effected by higher capacitance cables, which leaves you with more choice.
Are you thinking there is a particular type speaker cable that is better suited to your amp/speaker combo?
Is there something about the Eclipse cables you have that you do not like?
What prompted you to look for low capacitance AND low inductance cables?
They might not be a good choice for your combination. You also have to factor in the impedance of the speakers.
My comments on Tube vs Solid state is "general" in nature - some tube amps may perform better with lower capacitance cables and some better with higher capacitance cables - but "generally" tube amps are tolerant of high capacitance cables.
Perhaps you should try some different cables and see what sounds best?
Please provide answers to the questions above
Regards - Steve