EL 34 tubes

Definitely try TS el34b, great top end and rich mids. Also GL KT77 if they’ll work in your amp. 

I think there is an amplifier or tube-related Forum where you might get a response from persons more obsessed with amplifier tubes.  EL34s are power output tubes, not used in phono circuits.  And, as you can see, it will be a matter of opinion.

Gold Lion KT-77's, a replacement for the EL-34. More lively, dynamic, and transparent than standard EL-34's. 

I've had good luck with Mullard EL-34's  in my Jolida JD-1000a. for years.  They have good longevity, a nice price  and sound very good.

+1 @lowrider57  The Gold Lion KT77 is the best modern EL34 variant by far to my ears.