So, I've tried quite a few older 12AX7/12AU7 and still haven't found the sound I'm after. I really like the sort of shining brightness (I guess more bite than anything, similar to Doug Pinnick's Traynor Bassmaster amp) but I can't seem to find a tube that can do it (or at least get close). I'm using an ART Tube Pro MPA II (using it at high plate voltage) for a preamp, and a SS power amp with Avatar cabinets. I've tried: - 50's GE 12AX7 (Weren't bad sounding tubes, just weren't very bright) - 60's GE 12AU7A (Like the 12AX7, good sounding, just not bright) - Unknown Sylvania - Unknown RCA - JJ's ECC83S (Was horribly unimpressed with these...they sound more bland than the GE's) I've thought about using the Shuguang/Groove Tubes/Ruby/Sino's, and I've thought about Sovtek 12AX7-LPS. Any recommendations? I know tube suggestions are more or less like throwing darts blindfolded, but every bit helps.