What speakers are you using? As pointed out above, some speakers, even though they have dual binding posts, are not really designed to be bi-wired. I recall reading somewhere, for example, that John Dunlavy did not recommend bi-wiring, but he supplied dual sets of binding posts to satisfy the market.
My speakers require tri-wiring; I do that with a bi-wire speaker cable and jumpers from the manufacturer of the speaker cable. Haven't done much experimenting, as I either had a single speaker cable with two jumpers or the biwire with one jumper, and the change to biwiring involved a different cable manufacturer's product. So I can't say for sure that one way is better than the other. I think Al's posts are probably the best summary of what you're going to find in these forums. If you can afford to bi-wire and your speakers will take it, I'd suggest rolling the dice with a biwire in order to relieve any angst you might have. You could then compare the speakers fully bi-wired vs. using one part of the biwiring plus a jumper and report your findings to us!
My speakers require tri-wiring; I do that with a bi-wire speaker cable and jumpers from the manufacturer of the speaker cable. Haven't done much experimenting, as I either had a single speaker cable with two jumpers or the biwire with one jumper, and the change to biwiring involved a different cable manufacturer's product. So I can't say for sure that one way is better than the other. I think Al's posts are probably the best summary of what you're going to find in these forums. If you can afford to bi-wire and your speakers will take it, I'd suggest rolling the dice with a biwire in order to relieve any angst you might have. You could then compare the speakers fully bi-wired vs. using one part of the biwiring plus a jumper and report your findings to us!