The best deal I've found is Wakecord. No stretch, very thin and light. Not too many boarders use it and I don't know why. Forty-five bucks for a 75' one piece. They make them to whatever lengths you want. The only down side I've found is that after the rope gets a little used, it gets tangled easily when coiled. I just pull it in and let it fall on the floor between riders, then just toss the handle to the rider and it feeds out perfectly. You can find it at
www.wakecord.com