I use DIY silver foil speaker cables with my Lamm SETs.
There was a group buy quite a few years ago organized by John Chapman and he obtained some wide pure silver foil for the participants. I paid around $200. These cables are just foils, wrapped in wide Teflon plumbers tape, and the placed back to back and wrapped again with Telflon. The ends are shaped with some Origami-like folding of the foil and then I cut a notch with some small scissors - so no connectors.
I think good silver cables go well with SETs. These ribbon cables were great with my Welborne Labs 300b SETs, and even better with the Lamm ML2.1s.
Regards,