I have used Duelund parts throuhout the crossover incredibly good but expensive .On my new speaker the Difinitive technologys Mythos-ST the crossover is a excellent design with rubbish Xover parts . I have found the Jantzen Superior capacitors to be a little better than the Mundorf Supreme,and I also used the Jantzen Silver for the smallest value to throw in a little extra air and
precision to the tweeter, The Duelund are a hair better at 5x the cost. The resistors the Duelund are the Best they just get out of the way of the performance and priced reasonably.
For 6 caps and 8 resistors $250 was a small price to pay for the Huge improvement , please remember on average only 20% actually goes into the electronics you have , with speakers 25%,I worked in Audio sales many years ago
this is a fact this is why for a minimal amount of moneys you can transform your equipment ,and I found a Genius
of a technician that has worked for several electronics and speaker companys with 35 years experience ,far better than any so called Modder I have found .He does not advertise and is allways busy his reputation speaks for itself,I am enjoying every minute of it !!