🚀 go-pugleaf

Just pick up any high quality speaker cable.  Something like monster cable
will do.  Don't be fooled by the thickness though.  It's the same gauge as
any other cable, but it has a patented clear casing that makes the wire
appear to look thicker.  But it's decent stuff in any case.

It's more important to keep your cables as short as possible.  Ideally,
you want to have you power amp in between the speakers so the cables
can be as short as possible.  The problem with cables is they have a 
certain amount of inductance that makes them a low pass filter.
Thus, some people will argue that a poor cable will round off the high
ends near 20,000 Hz.  Most of us can't hear much beyond 15,000 Hz, so
this may or may not be valid.  But shortening the cable is the best
way to reduce inductance.