Haven't used that series but I have used the M-tube caps, silver in oil, supreme, and MKP series. They all sounded a bit different but were all quality components. And those seem reasonably enough priced to give them a whirl. Test them out and let us know how they sound.
I concur: everything I have used from Mundorff is excellent, each line in there own special way. But, have not noticed these before ( parts conexion says they are customs) Given their reputation and proven performance I would expect them to be very good.
