6L6s
JAN-Philips 6L6GCs - the 'sweetest' tone
Sovtek's KT66 6L6 - killer tone
Tung Sol's 5881 6L6s - crystal clean with fat break up at volume
JJs are said to be slightly better than EHs, which are not quite as thick
JJ,s have great attack, warmer with higher bias but some detail loss
12AX7
TAD 7025-S looks like the best 12AX7 on the market for microphonics, noise/hiss, detail and dynamics.
JAN-Philips 5751 and Tung Sol 12AX7 are close seconds.
