I have also used Jim McShane for NOS 12AU7s when I wanted to try tube rolling in my Bottlehead Foreplay preamp...he suggested 3 choices, GE, RTF and Teles...the Teles were over my budget, I bought both the GE and the RTF...the GE sounded better in my Foreplay, faster than the RTF, which sounded bland and not as extended as the (much cheaper) GE.
YMMV.