Capacitor rolling.

At least you don't have to worry about rare NOS caps to roll !

When oscilloscopes pay for the gear, I'll let them tell me my values, Until then, I buy what I like to listen to, can afford and can put in my living room without blocking the windows. :)

Having said that, I did in fact choose Clarity for their absolute transparency.

Still, I can see "enriched" caps as being desirable as well.

The poster is looking for warmth. All caps have a sound or personality as does all gear. The Jupiter VT caps are natural sounding with lots of meat on the bones....opposite of thin and bright sounding. Nice resolution, but they deliver the goods with a nice warmth. Perfect for the poster.

The Jupiter copper foil caps are more resolute yet, with more top end extension and air. They reveal Micro details of the music better and do all of this with a smoothness that is both natural and easy on the ears. 

Yes the Jupiter caps are very,  very quiet and well damped just like  Duelund caps. Amazing what the removal noise does for music! 

In my view, it’s technology first, materials second, brand third.

Technology for the best caps, IMO, is either metallized dielectric (e.g. aluminum deposited on teflon), or film and foil (a layer of metallic film and a layer of dielectric). Film and foil is far superior. Then there is air gap, which consists of plates of metal separated by air, but that is limited to small values.

Materials mainly used are aluminum, tin, or copper for the metal, and paper in oil, polypropylene, styrene, or teflon for dielectric. Tin or copper can be soldered, and seem to me to give a smoother sound. Dielectrics seem to affect the sound as a function of dielectric constant: clarity improves as dielectric constant goes down. That puts styrene and teflon at the top.

That said, I find that styrene sounds a little more neutral, and teflon a little edgier. Air gap and vacuum are the very best, but very bulky and very expensive.

Last is brand and details of their process. Thickness of metallization is critical to the sound of metallized caps. More is better, but good luck in finding that information. MIT has a patented method of connection, which makes their multicap line sound better to me. Dueland is very close to an optimal configuration, but you have to pay for it.

I use a lot of MIT Multicap RTX styrene and tin f&f capacitors when I can’t use air gap, as they suit my system and my tastes. YMMV