Preamp caps Jupiter copper foil or Jupiter HT worth double the money?

I prefer the Jupiter copper over the Vcap copper in electronics, I find the Vcap too detailed and lacking body or meat on the bones  of the Jupiter copper foil. 

In terns of your question the answer is easy.  The HT will give you more of what you already have. The Jupiter copper foil will give you exactly what you want and are looking for.  No doubt about it. Bypass it with a Duelund .01uf tinned copper foil cap and you are in sonic heaven.  The two are so special together. Magic really. 

Jeff at Sonic Craft is great and he will have them in stock.....on sale! 

I saw some 2.2 uf Jupiter copper foils on Audio Mart I think.   Chris of Jupiter Condenser made these flat stacked style as a special order.  It is more time consuming and expensive to make these caps flat stacked and not the typical round shape. 

The Vcaps are great sounding caps for sure and just have a different sonic signature than the Jupiter copper foils.  

Here is the link for the Jupiter caps for sale. Jupiter used to sell the HT caps in the flat stacked variety and I always purchased those over the round HT ones as they sounded a tad better. They stopped making them because they required more labor time and expense. These flat stacked copper ones will be very, very good sounding.

Confirm with the seller that these are rated for 600v. I did not see the voltage rating on the cap labels. Chris at Jupiter Condenser can also confirm. I would also ask if these are a matched set within 1%. The seller can take out his multimeter and confirm this for you. The seller is asking $250 for the flat stacked pair. Perhaps you can do a little better as Sonic Craft is selling the round Jupiter copper 2.2uf/600v for $146 each on sale. Sonic Craft will match the two caps within a 1% tolerance which is recommended.

https://www.usaudiomart.com/details/649484389-rare-jupiter-flat-stacked-copper-foil-caps-

Lastly, if you are able to buy those flat stacked coppers at a great price, then you should consider adding the Duelund tinned copper .01uf bypass caps in parallel. The combo is just beautiful sounding. You will hear improved realism, midrange bloom, larger stage, inner beauty and intimacy.  Parts Connextion has them on sale for $65 each. Great price while they last! 

If you need any any help with the upgrade please free to contact me. 

Miflex is better than what you have by a good margin as are All copper foil caps.  You are right. If Jeff says the Milflex are great, then they are great.  He knows his stuff and can be trusted 100%.  Humble Capacitor Review says they sound more forward than the Jupiter and the Jupiter sounds more rich. I would buy the Milflex and parallel with the Duelund .01 tinned copper bypass caps.   For the money, you won’t do better!