You mean your amp has something like these Slip?
If that's what they look like then I would use banana plugs, preferably the gold coated ones that is what I use on almost all of my gear if possible.
The only speaker connection I don't have are "Balanced" inputs, that is an entirely new level and I've never owned anything that had those. I have thought about it but am happy playing in the upper midrange of audio gear, the really expensive stuff is like a Ferrari, you pay so much for modest improvements I just could never justify that kind of investment, if money was no object that would be a different story.
George, it is nice that you can change around certain interconnects and get the sound of the ML's to "mellow" out, I don't go too far into that area but do have a few really good interconnects. For the average person with entry level equipment they might not really notice much of a difference, but when you start going up into the more expensive gear like Parasound/ML's then you will definitely hear the difference.
What pre-amp are you using?