Help with upgrading speaker cables

Audience AU24 would be a good choice. I use TG Audio cables which are silver but they are not bright, they are detailed, smooth and slightly warm.

Audio Note Lexus is another good choice.

With the Bat you might want a little brightening, which might not be bright to the ear. Maybe try a silver cable like the Analysis Plus. I personally really like Reality Cables. I think they sound amazing with SET amps.

I am using Vandersteen 5A and tried many brands of cables including Kimber Select. The best were Anti-Cables - not twisted. Their performance with my components was better than Purist, Cardas, Audioquest, Analysis Plus, Wireworld, etc. They are cheap and you should try their money back guarantee.

I use Synergistic Research Tesla cables with my all BAT system. They are the best I've heard by a long shot.

Relatively thick Ohno continous copper crystal, also called long crystal copper Zip cord. It is nuetral and not a dollar per foot it is about $5-7. It con be found from many sources do a search. I think Moon audio and certainly Neotech amongst many others. It may not be what you want nuetrality can be shockingly different than your reference system sound.