Klaus and others interested,
I got a pair of Bogdan Silver Spirit XLRs to mate the BV-Audio to the Extremes and wow, the sound has taken another step up. These cables are three separate silver coils (bare wire) in teflon tubes linked by an Ebony spacer. Whether the improvement is due to the use of the balanced sockets or the cable itself, I don't know. MFG of the cable says allow 150-200 hours of break-in for them but out of the box they sound great. More detail, smoother sound, greater depth, and surprisingly, even better bass.
By the way, my speakers, Roman Audio Centurions, look very much like the Loreleis, two ways, with a front baffle that slopes back. They have a Diaural crossover (developed by Ray Kimber), but not quite as tall as the Loreleis. The Extremes are the heart of the system and make these speakers sing like no other amp I've tried. No contest. And as you know, the amps "burgandy" finish matches the Roman "Jag red" perfectly.