Mike, welcome to Axiom. There really is no such thing as "audiophile grade" speaker wire since the term "grade" implies that it's actually significantly better in helping transmit audio information. Blind testing indicates that this is purely BS(Before Science).
Speaker wiring and interconnecting cables are two areas notorious for snake oil salesmen. This
explanation of speaker wiring realities by a veteran audio professional has helped a lot of people avoid being played for suckers. Gauge of wire is the significant factor, and the length of the run together with the impedance of the speaker determine the advisable gauge(as shown in Mr. Russell's table).
Once you've determined the gauge you need(I use 16ga)and whether you're going to use wiring with an outer jacket suitable for behind-the-wall installation, there are several sources to get it at low cost. Local hardware suppliers such as Home Depot and Lowes can cut it to order. Online suppliers such as MonoPrice and several others are readily available.
