Best Speaker cable in the $400.00-$500.00 range for 2 meters


I currently have a Rogue Audio Magnum power amp, Rogue Preamp, Triton 5 speakers with 2 SVS subwoofers,
and a Cary Audio CD player. My current speaker cable is by Discovery Cable. Looking to upgrade my cable and
was recommended the Nordost White Lightening which retails for $377.00 a pair for 2 meters and the Nordost Purple Flare, both in the Leif family of Nordost for $500.00 per pair  for 2 meters. In short my budget is
 $500.00 per pair. If there is any other cable that can be recommended in my price range that my be superior
 I would appreciate any suggestions.  Looking for the best use of the $500.00.
128x128kjl1065
1. Ignore everyone that doesn't have your amp.
and source and speakers and room and preference
Well, since OP so far not willing to specify what kind of improvements he's looking for, I'll submit there's a 2m pair of Acoustic Zen Hologram II on eBay for $599.  Great all-around cable I'd think would be tough to beat at that price.  But then since we don't know the OP's tastes, who knows???  Just a crap shoot here. 
Hi.  72 year old seasoned music lover.  I spent much time with a local cable designer in Maine who went up against the big boy stuff.  My most recent find has been working with Tim Stinson of Luminous Audio, a small, dedicated specialty company that has fair pricing and wonderfully musical, revealing products.  Highly recommended, kjl1065!