Personally, I'm not a big fan of Duelund as the wire is not very neutral. It may work well for you though, but is more system dependent vs a more neutral cable.
Viking is probably pretty good, I know the owner David and have shown with him before, and built cables for him as well... but he's pretty new to building cables and I'd be more than happy to put my cables up against his. I offer free demos so you're welcome to borrow my demos and compare them to whatever you like.