Roger Russell's yap about speaker wire
http://www.roger-russell.com/wire/wire.htm
I like connectors from Parts Express, no solder, a pair of set screws
Similar solderless, Spade Connectors
Personally, I won't spend money on speaker cables, I make my own out of twisting a pair of ethernet cables (cat 5,6,7,8 doesn't matter). Look for pure copper, look for smaller number/higher awg, I prefer stranded to solid, I wrap/tape two different colors so I know +/- each end. Cut off the factory connectors if any, attach solderless connectors from Parts Express.
Combined Wire Gauge Calculator
i.e. 8 strands of awg 22 = 13 awg
i.e. 8 strands of awg 26 = 17 awg