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
Telefunken has a great 3D soundstage. I have tried lots of others but keep coming back to Tele. I use them in my pre amp, power amp and phono amp. Ymmv.

thanks rotaryphone Will any Telefunken 12AX7 do? Are there a variety to chose from?
IMHO, one of the best 12AX7 is the Mullard CV4004.  I have drawers full of tubes and these have always sounded great.