@bigtwin If you like lugs, then solid copper is definitely the way to go. Many traditional bananas have problems. I've had them come apart on me.
So I use silver plated BFA style "banana" plugs. Those have the added advantage of low mass which is the main thing I have against lugs. This is a bit of a sidetrack on this thread but I don't like a huge mass in the signal path like most binding posts are. I make my own binding posts out of the same high conductivity copper you mention but it is 3/16" tubing pressed into a nylon housing.