If Bi-Wiring is an option, should I choose Bi-wiring over single banana with free jumpers

Best bi wire

2nd best good jumpers, preferably same as main cables.  Main cables should connect to mid / high and jumper to low end.

Factory jumpers typically crap.

Almost everyone here said this already.  (Almost everybody) :)

My experience when I had one amp with two pairs of output terminals for each channel is as follows. I did not notice much difference between a large gauge jumper wire and the connector that came with the speaker. I did not test it much back and forth very many times, so if there was a difference, it was not noticeable to me. I also tried bi-wiring and felt that it sounded a bit better, but not a large jump or a massive improvement. It was subtle and only on certain songs. I certainly don’t think it hurts to bi-wire other than the cost. I suggest you try different options and listen for yourself. Cables are easy to move around and return. Every system, room, and ear is different.   A change that may make an improvement on one system may not make much of an improvement in another.  And, there are a lot of different types of factory and aftermarket jumpers.   

The same tired old myths keep re-surfacing don't they.  Bi-wiring made sense back before we had good speaker wire and everyone was using zip chord.  Those days ended around 1978.  There is no benefit to bi-wiring today.  None, nade, zilch  this has been proven in a 1000 double blind tests.  As has already been suggested, use the same wire for jumpers as you use for your speaker wire.  It makes no difference which posts you hook up to from your amps, however, since they are interconnected electrically by the jumpers anyway.  

My experience has been to use a higher quality single run of speaker cables with the same make for jumpers. Factor in the cost of the jumpers when choosing a line of speaker cables and you'll be fine. 

All the best,
Nonoise

Having rebuilt many speakers many 4 binding posts are BS internally jumped then cheap gold over cheap brass , unless the speakers terminals are directly dived highs and Bass from the Xover then it’s just a marketing ploy

that being said , you want = equal quality jumpers to the Loudspeaker cables with gold over Copper , if you can internally bywire your speaker cables that is the best way to do this .