Speaker cable - Atlas, Audioquest, or Tellurium Q Black 2?

All -

Been on an upgrade kick with C19, and now would like to ice the cake with speaker cable.  Currently using a biwired run of Linn K20 that must be 20 years old; I also have a 14' biwire set of Naim NACA5 that might sound slightly better but is a complete pain in the arse to use - very stiff and too long. 

I've narrowed it to the three brands in the title.  Atlas because Exposure has used them in various shows, Audioquest because my interconnects are AQ (Victoria DBS and Yukon), Tellurium Q Black 2 based on people I'd believe having good things to say about it. 

The first obvious question is which AQ - I have no idea.  The second obvious question is amp/speaker - amps are Exposure 3010S2 monoblocks, speakers are Monitor Audio Gold GX300s. 

I'd like to stay around $500 or so; if I were to jump up beyond that I'd probably get a set of TQ Ultra Black that is available used.  The TQ Black 2 is $360 for a 3 meter pair; the Atlas would be $660 for the same.  Used is fine.
Thanks in advance!