It may be a more expensive experiment, and I cannot speak to actually reccomend the solution as being good or bad, but you might also consider Paul Speltz's Zero-Autoformers as a possible solution. They are essentially in-line (speaker cables) transformers that make your amp see the speakers as having 2X, 3X, or 4X the impedance. A more thorough explanation and reviews are available on the website. I have no experience with them to speak of. Actually I have a pair of them that belongs to my friend Peter, but I have not hooked them up. He may be selling his pair as he'd purchased them to use with his Quads (electrostatic speakers) and was not pleased with the results there. Your Dynaudios are a different animal though. Anyway, some folks like what these things do. Just two more pennies in your hat.
Marco
Marco