I have used non-locking Ultralink bananas with 4B-ST, 8B-ST, and 3B-ST amps with no problems, other than the fact that the connection is not as tight as I would like. I usually experiment with bananas, but end up simply using bare wire for my connections on both ends.
If you haven't already tried the bananas with your speakers, it might be best to try them first. Most speakers allow the nut to be totally removed which should give you a better idea of how tight the fit is.