Kimber 8TC or NBS King/Serpent speaker cables

I'm running a Krell 400 integrated and Vienna Acoustic Beethoven Concert Grands. I very recently bought both new and didn't get speaker cables at the time. I've been using junk spearker cable for a month since I made the purchase. I'm looking at the Kimber 8TC or a used pair of NBS King/Serpent v2.

I hear a lot of good things about the specific 8tc Kimber Kable and although I can't find much feedback on the NBS cables I know they were really expensive when they were new (8' 1600.00?)(on sale now for 400.00)and just because they're a few years old I assume they haven't worn out. They're in good condition I just don't know anything about the brand except that they're sort of exclusive and generally everything they make is really expensive.
Please keep in mind that my price range is around 400.00
Thanks for any feedback.
Mike