Ampohm capacitor evaluation? vs Mundorf vs Dueland

Has anyone done a comparison of Ampohm caps vs Mundorf vs Dueland in speaker crossovers? The Ampohm have gotten good reviews and are significantly cheaper than the others.
IMO, Mundorf doesn't come close to Duelund.

Lots of good info in this thread. I believe Ampohm may have been mentioned on one of the last few pages:
Google Humble Homemade Hifi and look at the topic Cap Test. He rates these capacitors and many more.