Not that it matters much, but I prefer the wire in a jacket that is CL2 rated...
Get the most out of your home audio system with high quality, pure bare copper speaker wire from Monoprice™!Pure Bare Copper is a superior conductor to the copper clad aluminum (CCA) conductors
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You can also get it in black...
Monoprice Plenum Speaker Wire is designed to meet the most stringent standards of safety for both residential and commercial applications. The fire-retardant cable jacket bears the CMP plenum air spac
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The excellent color markings are a huge plus in my book, and I like to run wiring in walls, so having it up to fire code to do so is a real plus.
Oh, and if you are connecting to a receiver or speaker which accepts banana plugs, pick up some decent ones like these Sewell Silverbacks: