Really can't help you with your choice, but I can give you a possibly cheaper solution. If you like the Quattro Fil you may have a relatively inexpensive alternative. Get a 6 ft long (or more) used El Dorado power cord for about $400. Then get 8 Eichman RCA's. The El Dorado is really nothing more than 2 Quattro Fil wires run together. Yes, they do have a slightly different outer casing, but the rest is the same. This will let you make 2 sets of Quattro Fil's for much less than the retail or used price of even one "real" Quattro Fil.
Enjoy,
Bob