Herron VTPH-2A Phono Preamp....anyone familiar?

The VTPH-2A uses 12at7 & 12ax7 tubes, can any body please tell me what tube brand Keith supplied/preferred for the VTPH-2A? Thx

Electro-Harmonix 12AX7 EHElectro-Harmonix 12AT7 EH
http://www.herronaudio.com/tubes.html

I'm very interested in the Herron. I've also been looking at the ModWright 9.0. Which way is best to go? I don't plan on buying another phono preamp in my lifetime, I want to make the right choice.

The Herron & Modwright are both great.  But I would choose the Herron.  One reason IMHO is that the Herron has a FET first stage for MC followed by a tube second stage for the MC (the tubes also act as the only stage for MM).  So, you can bypass the FETs when using an MC cart by using a separate SUT into the Herron's tube only MM stage.  However, the Modwright has a tube/JFET hybrid first stage for MC followed by constant current source loading for the second stage.  There does not seem to be a way to bypass the JFETs in the Modwright.  YMMV.

Can anyone describe what I might be able to expect by adding the Herron VTPH-2A to my system? I'm currently running a Denon DP-62L TT with the straight black tonearm wand, Grace F-9 cart with SoundSmith Nude Ruby OCL stylus, Yamaha A-S3000 integrated amp and Magico A3 speakers. I also set-up a mono TT: Pioneer PL-41A with a Denon DL-102 high output MC mono cart. I've never heard tubes before. I think my system sounds great but I'm wondering if adding a tube phono preamp takes the sonics to another level? I'd love to demo one but that isn't an option Herron offers. Thanks!