Hey Jim, I'm gonna chine in with my usual recommendation of Zu Event MK 1 speaker cables. They've been superseded by the Mk 2 but if you can find a used pair, it would be worth your while. I say this as since I've swapped out the spades for bananas on the amp end, things improved so much that it was like listening to a different set of speakers. This led to my sending them back to have the speaker ends swapped out the same way for almost the same amount of improvement.
I thought that due to the lousy connectors that my Marantz has (plastic shrouded 5-way binding posts designed in the 8th circle of hell) were to blame for the poor connection. But I had similar results with the speaker connectors as well and they are some top line Cardas speaker connectors.
My long winded post is simply to make sure you use bananas instead of spades to fully realize the potential of the wire you chose. I was wrong on another post as to the metal makeup of the bananas and they are a combination of beryllium and copper for the outer layer and some sort of rhodium and copper inside. I don't know if they are proprietary to Zu or is they are off the shelf units that anyone can get. Zu told me that they are getting great feedback with them. Whatever your choice ends up being, please take this into consideration since not having the best possible connection can hide the performance potential of a good cable.
All the best,
Nonoise