Preamp Output Capacitor: Mundorf Supreme vs. Supreme Silver Oil

“...came along with the ODAM suggestion. They’re smaller and cheaper than the Miflex so I’m looking forward to trying them...”

Where do you find the ODAM capacitors selling cheaper than the Miflex?
A 0.47uF Miflex is around $25 vs. a 0.47 Vcap ODAM priced at $84. The price differential is a little less for larger uF values but definitely not cheaper. 
I’m very tempted to try the ODAMs in my Aric Audio Unlimited preamp already upgraded with the  Audyn True Copper capacitors. A clear improvement over the stock red Audyns.  Anyone has experience with the newer Audyn True Copper Max? For a 2.2uF value they are about the same price as the ODAMs. 

@kalali 

I didn't know the prices of the lower values at the time of my post. I bought a pair of 2.2uF ODAM's from VHaudio for $175 and the cheapest I saw for Miflex was around $200 for a pair.

t_ramey, thanks. I’m also looking at 2.2uF values for my preamp and I now see the prices are on par for 630 volts rated model when buying a pair and ODAM pair is cheaper for the ones rated at 400 volts.

@kalali The Audyn True Copper Max are excellent caps. I recommend that you install the ODAM in a different component that can benefit from high quality caps. I bet that the True Copper and ODAM will provide excellent synergy. I use copper foil and ODAM caps in my system with great results. 

Thanks for the input. One quick and hopefully non controversial question: do any of these capacitors need to be installed in a specific direction even though they are not marked for direction? I have seen some tube amplifier building/repair instructional videos where the designer/builder uses a special device to measure a certain parameter to determine the “correct“ direction for installing the capacitor, e.g., foil side towards the tube socket, etc., or something like that if I remember correctly. He claimed it makes difference. Just wondering.