Your silver wire jumpers are probably as good as anything you could purchase. If they sound good to you, then stick with them. However, some like terminations on their jumpers for convenience.
Wire and connectors that might work well for those making their own jumpers include 5N OCC 14awg copper, or 5N OCC 16awg silver. Consider KLE Bananas, which are silver plated pure copper and are stackable, and simple copper spades like these from Vampire or these silver plated copper spades from Xhadow.