Help me pick some new or used speaker cables

@rkfaberdds if purchasing used, beware of counterfeits especially AQ cables.

True for AQ as @kennyc mentioned here, and watch out for counterfeit Cardas too. They are counterfeiting cable models that Cardas does not produce any longer is one way to tell, and the connector ends are bulged out with a different diameter jacket as first clues. If it does not have the original certification, #, and original packaging and they just stick them in a fake copied literature and zip bag, that’s another clue.

Best get them from a refutable source, and worst case like others here did, send them into the MFG for validation and certification if you believe you may have mistakenly bought fake counterfeits. Best to know rather than playing for weeks hoping the sound will get better in time, and a dead end road.

Purist cables very nice cables and interconnects , Great company questions repairs , There "always" pick up the phone even by the owner Jim .

Just bought Worlds Best Cables with a 8 gauge bi-wire arrangement on spades. Ran me less than $300 and sound great. Had heavy Monster M cables on from the 80’s and they weren’t terrible, but read a few good things about WBC and for the money they worked out fine.

There are some great options for speaker cables mentioned - I'd also consider Nordost. I've been very impressed with them as with Transparent.  

I've been very pleased splitting my cables - Shunyata for power and Kimber for speakers/interconnects.  

Some great advice thus far. I’d add that buy used because if you don’t achieve what you seek, you can sell them for what you paid. If you buy new, support your local dealer and try them in your system to know 1st hand if it’s the right combo.
 

The cables I’ve liked the best are OCC wire to start with. Ocellia are sublime, and should put you in the right place. If by chance you’re running Sylvania 6SN7 in the MW LS100, get them out in favour of a different tube like some 40, or 50’s RCA. (I had a LS100)