I finally got new tubes for my VOX amp. The Chinese ones in there have been fairly decent, but somewhat microphonic at times. Man, I think I had to remove like 48 screws, or something like that just to get to the tubes... ugh. As per a few recommendations here, I went with the JJ's. A matched set of EL84's, an ECC803S for V1, and ECC83's for V2 and V3. No earth shattering differences, but seems a bit smoother? So far, I like what I hear, but I'll report back after the honeymoon is over.