As has been stated, the benefits of bi-wiring are system dependent and dependent on how you do it (internal or shotgun). With many speakers bi-wiring is beneficial. But I think the worst idea of all is shotgunning. I reckon getting a better cable is almost always better than doubling the runs. In many cases doubling the runs is worse even if you are not bi-wiring. I just want to also add that spending a lot on jumpers makes little sense to me because with many speakers you can open them up and reconnect the internal wires all to the one set of binding posts and do without the jumpers altogether, and get a better result.