Redkiwi has taken the time to give you the information that I should have offered. Not only is his assessment fair, my own experience has proven to be identical.
The only other thing I would add to this topic is the possibility of opting for NOS tubes. These are another whole quality level above all other, but certainly the most expensive way to go.
The only other thing I would add to this topic is the possibility of opting for NOS tubes. These are another whole quality level above all other, but certainly the most expensive way to go.