Good help and overview by Preamp tube report created by Dirk Munzinger :

http://www.tube-town.net/info/doc/tt-report-preamp-tubes-engl.pdf
and
TT ultimate Tubemap
http://www.tube-town.net/info/doc/tt-tubemap.pdf


My tubes :

V1 :   TT 12AX7 classic V1    or
         TT 12AX7 classic :
       "open end tube" very good for clean sounds.
        In the describtion of preamp tube report mentioned :
        "We do not recommend this tube for Blues2,   
         but dont forget OD delivers mids like ...

V2 :  JJ 12AX7 / ECC83S
        high amplification with smooth and very warm sound.

both tubes together :
        with 20% vol of my guitar , good chrunch
        vol pot at guitar more than 2/3rd, lead sound with rich rich harmonics


( I'll tried many Power amp tubes :
 My peronal favorite    SED 6L6   real allrounder with nice headroom