I researched the caps as needed here, and there are probably newer better caps since 2011, though for a price.I gave a short look at this link. How does this guy have time and money to compare all of these, especially given the burn-in time? That top of the line Duelund looks interesting. Some of those sell for north of $800. Even if the OEM price is one-half of that, that would probably add $10,000 retail to put those in a pair of speakers!
http://www.humblehomemadehifi.com/Cap.html
The writer quite liked the Clarity CMR and some of the Mundorfs. A DIYer with money could get carried away . . .