Need recommendations on 15ft speaker cables

I like SR's offerings. 

I agree that you probably want to stick with copper as silver will probably sound a little harsh with your speakers.

Check out usedcable.com and see what they have in stock....they usually have a pretty good selection of upper-end stuff.

Try the Canare 4S11 linked above.

Two of the 15 foot runs will be  around $140 from Amazon.

I used it (bulk cable) for 3 months and can recommend  it.

It's s PITA to strip so go with the ready made cables.

DeKay

IME in over 50 years at this, the best speaker cable and best deal, by far, are Silversmith Fideliums. 15’ is long but 2 meters of Fideliums are $1200.

They replaced $6K in my system that are now relatively junk.

They have some amazing reviews including Greg Weaver’s YouTube who says they are the “Product of the Century”!

I also need a long cable run, around 17ft. I had Blue Jeans Canare 4S11 for a while and I thought it was a great cable for the money once it breaks in. I decided to upgrade and went with Acoustic Zen Hologram cables. The cables have excellent tonality and are a real step up in every way in my system from the Canare. I spoke to Robert at Acoustic Zen and he recommended the Hologram for a long run.
 

If you are interested, reach out to Robert for advice and pricing.

I agree with Terry9....components are a top priority especially speakers. I bought the Canare OF wire by the foot from Performanceaudio at a great price since I'm always looking for a great deal. I then assembled them myself with Nakamichi banana jacks. Ebay has a vendor from Minneapolis that has Canare wire already assembled  at various lengths and colors if you don't want to dink around with assembly.