Vintage tube suggestions


Need help with tube selection. What would you consider a great value 
(budget of $100 per tube) for 12AX7 vintage tubes? Application would 
be preamp, and possibly DAC.
markj941
What preamp do you own? Also what is your amp? The type of circuit and design is important in tube rolling. If you want detail, good imaging, transparency, then Telefunken or Siemens. Want warmer, liquid mids, then Mullard. RCA BlackPlates are great for slightly warm sonics with great soundstaging. These are all NOS recommendations.

I think it will be difficult to find Tele’s for $100 each. Plus each manufacturer made 12ax tubes with different internal structures.
If I was to choose one tube it would be the Mullard CV4004 (12AX7). Brimar is another good tube, similar to Mullard but more extended. Both made in the UK.
I see someone selling both the ribbed plates and the smooth plates at 
the same price. Is either a better deal at the same money?
markj, The smoothplate  Telefunkens usually sell for more, but many people think they sound the same.

It would help a lot if you told us what preamp you have and what kind of sound you're looking for.
My preamp is a Jolida fusion, I'm currently using Genalex Gold Lions
for both the 12AT7 and 12AX7. My DAC is a Jolida glass fx tube dac III.
In the DAC I'm using a pair of Mullard 12AX7 / ECC83. Though I think
the tubes I'm using sound very good, I would like more air, larger
soundstage. Vintage?