Like many already mentioned, before you roll the tubes, let the amp play for 100 hours at least. This way the components and the tubes will be on their potential. Try to listen to the amp every 25 hours to see if any changes will appear. You may also use the same record, so the changes, if any, can be easier to detect.
Personaly I tried NOS TESLA EL34 only and liked them. I compared them to NOS GEC KT88 and they did a very good job. My amp, at the time, was PrimaLuna Prologue Two.
I would say, take some time and report back with more details, its fun.
Personaly I tried NOS TESLA EL34 only and liked them. I compared them to NOS GEC KT88 and they did a very good job. My amp, at the time, was PrimaLuna Prologue Two.
I would say, take some time and report back with more details, its fun.