The question is, how do you want to change the sound? Amprex 7308 will open the top and add detail. Telefunkens will make the sound warmer and the midrange really rich. I have Amprex and Philips for my ET 5. Used Amprex in my LP 70. EAT makes a great tube also. Would be most happy to go over all this with you. You can also consider KT 88s for your power tubes. Send Jeff at CJ an email and he can give you some more detail.
6922 tube selection
Time to retube the C-J pre amp and amp. Looking at Genalex Gold Lion tubes at $46.00 each vs Electro Harmonix at $26.00 each. Need a total of 7 tubes. (4 for pre amp and 3 for amp). Any reason to spend the extra money on the Gold Lions? And, any need to spend the extra $5.00 per tube for matching? Thanks for the feedback!