I recently bought some PS Audio FR5 speakers, the first speakers I've owned that can be bi-wired/bi-amped. (they are pretty awesome speakers, BTW) I decided to buy some bi-wire speaker cables and I landed on a cable by a company with the pretty ambitious name of World's Best Cables. The description on Amazon and their model name is "WORLDS BEST CABLES 15 Foot Ultimate - 7 AWG - Ultra-Pure OFC – Extra Premium Audiophile HiFi Bi-Wire Speaker Cable Pair with Eminence Gold Banana Plugs & Carbon Tweed Jacket". It's a mouthful for sure. WBC has a really awesome return policy: 24 months, full refund, no questions asked. That gives you time to break them in, get to know them and compare them to any other cables you want. WBC encourages you to use that return policy. They say most reputable cable companies offer a similar warranty, so you have time to buy and return a bunch of different cables.
I bought 10' cables and was pretty happy with them. I recently had to rearrange my components and needed 15' cables, so after 14 months I returned the 10s and bought 15s. No sweat, no problem, full refund, including tax on the original purchase and the shipping to return the old ones. Personally, I think that's a pretty good deal.
I didn't compare the WBC to anything but the heavy gauge Monster cable and heavy gauge no-name bare cable I'd been using for the past umpteen years. I liked the WBC better, but was it the cable, the PS Audio FR5s, or the fact they they were bi-wired? I don't know...