I suggest Amperex US 7308 PQ White Label 60's, my reasoning is:
This is a quiet well balanced tube by design.
It presents hi's, mid's and lows evenly.(well balanced)
You can try them for a reasonable price.
You will hear your system through this tube.
By starting here you'll have a good idea where to go if it doesn't do it for you.
If you find you want more mid fullness you can go to Phillips Holland 7308 60's which is fuller in the mids etc.........
For more detail(less warmth also) Seimans CCA's etc...........
This is a quiet well balanced tube by design.
It presents hi's, mid's and lows evenly.(well balanced)
You can try them for a reasonable price.
You will hear your system through this tube.
By starting here you'll have a good idea where to go if it doesn't do it for you.
If you find you want more mid fullness you can go to Phillips Holland 7308 60's which is fuller in the mids etc.........
For more detail(less warmth also) Seimans CCA's etc...........