I lived with Valhalla for about 6 weeks and thought they were incredible.The best sounding cables I'd had in my system.Fast, detailed, transparent, did I mention fast? I subsequently demo'd the Jena Symphony and Pathfinder. In my system, the Jena's did did everything the Valhalla did, PRAT, speed, detail, transparency, but in addition rendered instruments with more body, had more extended highs and a more natural sounding bass. Going back to the Valhalla, they seemed a tad threadbare and lean, the absence of body obtained with the Jena's was quite noticeable. I found the background to be blacker with the Jena's also. But the thing that struck me most was the ease of presentation with the Jena's, it was a more musically natural ,easy sound. Kinda like the headroom increased. I don't know how else to describe it. I found these characteristics with both the Symphony's and Pathfinder, albeit to a greater degree with the latter, which I purchased, along with the Twin-19 SC's. I've not heard the Valkyres. If I had been budget restrained, I would still have purchased the Jena's (Symphony), in my system it bested the Valhalla.
