Considering how inexpensive a few inches of good wire is, you might as well use it if you have it on hand or you can get a little bit of it. But there's a lot more to be gained by shielding the guitar than there is by using premium wire. There's a good tutorial
here.
Speaking of which, I was looking at a Musician's Friend catalog and noticed the Monster instrument cables, one for rock and one for jazz. So I called Monster Cables and asked which cable was best for folk. The phone drone hemmed and hawed. I asked him which was more accurate, the rock or the jazz cable. He said he'd have an engineer call me back. I'm not saying the cables are bad - they're good, if overpriced - but selling different cables for different kinds of music is total BS and snake oil.