IMO, Mundorf caps in general aren't bad, but aren't worth their asking price.
Huge fan of Claritycaps. For warmth and on a budget, I use ESA caps. For transparency, dynamics, and when price or space isn't a concern, I use MR caps.
I'm a fan of Duelund too, but am not a fan of the regular VSF in speaker applications. Except for large values, I would only use VSF Black or CAST series in speakers.
Claritycap and Duelund are really onto something with their encapsulated/resonance free capacitors. The competition really needs to catch up.