I recently built a Fender Tweed Pro 5E5-A. I put Tungsol 7581A tubes in it. The tone is rich, chiming, well balanced - everything one could want from a Fender amp IF you like clean tones (I do, at least for this amp). I can turn it up as loud as I dare and it is still clean and rich.
If, on the other hand, you like grind and compression from the power tubes, go for 5881. 6L6GC split the difference.
If, on the other hand, you like grind and compression from the power tubes, go for 5881. 6L6GC split the difference.