When I started wiring up my speakers, I debated whether to use the binding posts, or the banana jacks. I noticed that the jacks are pretty good quality, and since they were there, I might as well use them. Flush-wall mounting wasn't a concern of mine, but I too didn't want my speaker wire doing a contortionist act by coming out the back-end of the banana jack like that. Instead, I ran the wire in through the other hole in the side of the jack. With the jacks inserted into the binding posts, the wires hang down from the jacks without any unusual stresses acting upon them.