Well, I don't know about your technical problems, but my opinion is this.
If you favor the right handed only kind of mouse, the ones that Logitech makes that are slanted a bit, then choose the G7.
If you like the symmetrical, ambidextrous mice, choose the Copperhead.
Either way, they're both good mice. Also, it's your choice whether you want wired or not. I prefer wired, because of [maybe my perceived] lag and the lack of battery life. And because of old tradition's sake.