I just got the Mundorfs, both silver in oil and silver gold, breaking them in but by now it is sounding really good...I am using cheaper tubes for the break in so I really could not compare soundwise, but with the cheapy tubes it is sounding better than before with the good tubes.
Check this great site I found somehwere:
http://www.humblehomemadehifi.com/Cap.html
Check this great site I found somehwere:
http://www.humblehomemadehifi.com/Cap.html