I would reccomend this:http://www.monoprice.com/products/produc...&seq=1&format=2
They have rolls of 100 ft, 250 ft, and 500 ft if you need more.
50 ft should be plenty for three front speakers though... depending on where your receiver is of course.
I bought something very similar from bluejeanscable for $0.61/ft... the monoprice version is def. cheaper
I would reccomend getting some banana plugs for the receiver end of the wire. I bought mine from buejeans cable and they came with some heat shrink and instructions. can buy those from monoprice at the same time you order your cable tho. I just left the speaker end of the wire unterminated.
Axiom also sells some speaker wire by the way.