Update time. After burning in the silver Duelund bypass caps for 2 weeks straight, I have a pretty good idea of the sound of this bypass cap. Also, remember that I swapped over to the Duelund silver from a Duelund copper bypass cap.
Things I liked about the silver - far more resolution and better transparency and soundstage layering
Things I didn't like about the silver - loss of tonal beauty vs. the Duelund copper cap
So, what to do? Quite the dilemma. I love the extra resolution of silver but I cannot live without the tonal accuracy that copper brings. Well, here's a pic of what I decided to do:

Yes, I decided to use BOTH. So far the sound is VERY good. All of the copper tone plus most of the silver resolution. Me happy.