We can probably agree that the binding posts, and the junpers serve only a practical purpose, have no sonic benefit, and are a necessary evil. Why not, if possible, eliminate (so to speak) the unused pair of binding posts and jumpers altogether, and make your speakers single-wired.
Access to the rear of the binding posts should be very easy. Unsolder the wires attached to one pair of posts, and solder them onto the other pair, making sure that you maintain correct polarity. It will cost you nothing, and if anything will provide a sonic benefit, this is it. It will be easily reversible if you ever want to do so. If you don't know how to use a soldering iron, and you are looking to spend anything over $100 anyway, from a sonic benefit standpoint, it would make sense to pay a technician one hour's labor to do so. It would probably take (or you) about twenty minutes to do so.