Neutral el-34 .re-issue o/p tube for Jolida 302b.

***********NEED ADVISE FROM JOLIDA 302B OWNERS*********** I just newly acquired a Jolida 302b (old version) and need a good neutral sounding new (re-issue)EL-34 output tubes.I know they have alot of good brand out there but cant' decide which is which??This int.amp will be my back up for main system.
Which one of the following EL-34/6CA7??
1.electro harmonic (fat bottle)
2.mullard (re-issue)
3.svetlana/Sed
Or any el-34 tubes out there better than aboved mentioned.
I'm sure NOS will be better but too rich for my blood.
Part of the system to be match are:
Jolida Jd-100 (cd-source)
Jm Labs Electra 936 (93db speaker sensitivity)
I listened mostly:
Soft Jazz/Soft Rock
Again,a million thanks to eveyone.