#1
Are these good tubes or should i upgrade as soon as possible? I currently have 2 6V6's and a 12AX7.

Would JJ's or groove tubes be better?
#2
jj's and groove tubes might be technically better, but its all about taste, i use groove tubes, because they're cheap and easy, and they have a pretty decent rating system to get a nice matched pair every time, so i dont have to bias on every change.

if it sounds good to your ears though, i wouldnt bother until they wear out.
im a blues man, but a good man, understand?
#4
in the GG&A forum theres a sticky called Every thing you ever wanted to know about tubes or something like that, have you looked in that yet?