Single vs Bi-wire Speaker Cable

Thanks to everyone who replied. The comments/suggestions were very helpful and informative. I pulled the trigger today, and purchased two full-range speaker cable pairs (1) the AQ Robin Hoods and (2) AQ Thunderbirds, a step-up from the William Tells. Will try them both, and will return one.

One additional question has come up, based upon a couple responses. Several folks suggested I should connect the speaker cables to the bass speaker posts, and then jumper to the treble posts. AQ's US retail price book, on page 23, suggests the opposite, for 3 way speakers (I have B&W 802/D2's). Thoughts?

I am using the William Tell bi wire combo with my B&W 802D3’s. Sound is wonderful.

OP: With the 802D's I believe they suggest to run the wire to the bottom jacks, then jumper(s) to the top jacks. Since you have both pairs... try biwire with the tells on top to see if it improves the sound after trying them individually with jumpers.  

Also have found tip top jumpers is all yah need. (All I do)  I have tried connecting to treble and base and can’t tell any difference. 

A while back there was much to do about doubling up on speaker wires. ( double sets/runs) Not sure where that landed. Bueller? Bueller?

Happy Ike Quebec’s birthday y’all. 

Contrary to most of the other opinions here, I say biwire works. It's easy to tell the difference if you biwire one speaker and don't the other. Can A/B just by walking from one to the other. Using Martin Logan Request which are highly resolving and Audioquest Type 8 splitting one cable's wires (has 8 conductors)  to biwire and leaving the other cable intact, it was eminently obvious that all the components of the program on the biwire side had better separation and clarity. When high and low frequency travels on the same wire the bass energy distorts the treble energy. Biwire eliminates that problem. As usual it's a matter of everyone can say otherwise but I heard it easily for myself so I can not be convinced otherwise. It's exactly the "cables don't make a difference" argument. All you can do is feel sorry for the people who can't hear it.