Looking For Exceptional 6L6's, KT66, or 7581a's

[zozoe]

Hiya,, For my Mac MC30 mono tube amp, w/o taking out a 2nd mortgage, what's the best all around winner?? Amp originally called for 1614 versions.... I'm presently eyeing a set of 7581's for around $100...
Many thnx 🕉🎵🎵

 

[petertub]

6L6GC JJ from eurotubes ( $54 for a matched pair )
https://www.eurotubes.com/store/pc/6L6GC-c59.htm