I have sort of given up on buying bi-wire speaker cables. I believe there is a sonic benefit to bi-wiring with some speakers, but to maximize the benefit you need to run the bi-wire pair separated from each other. Therefore, I ultimately prefer two single runs of the same cable. Another advantage is that you can try a single run of the wire first, and then decide whether you really like it before adding another single run when you can afford it. Purist actually doubles their wire on their bi-wire cables, which is good, but the cables are in the same jacket. This was a long way of saying buy the single run, try the jumpers and then decide later whether you want to add another single run. BTW, you can easily make your own jumpers using hook-up wire (partsconnexion has everything 20% off through the month), or even short runs of a manufacturer's speaker cable if you can get it. Try twisting up four wires of 20awg PCOCC copper (don't go less than 6-8 inches), and terminate with spades, bananas or one of each.
