Most desirable vacuum tubes for SET amps


Dear All,

Which is the most sought after tube for Single Ended Triode (SET) amps & why? Here’s few usual candidates. Please pick your choice from the list or add your own favorite tube name here.

300B
2A3
6C33C
211
845
GM70
PX25

Thanks
-M
manojrc
Generally, I think the 300B is probably the most popular, and therefore sought after option for a SET.  That being said, I personally prefer the 845 in a SET as I love the soundstage it delivers.  It also give you a touch more power and has a bit more flexibility than a 300B.  

My second preference is the PX25 as it provides a middle ground between the 2A3(ultra detailed) and the 300B(ultra lush).  It has a velvety detailed sound that is awesome with Avantgardes.

I don’t know the GC33C or GM70.  

Other candidates would be:

45
PX4
T100
EL34

other 300B derivatives
300B XLS
320B XLS
520B
1605

full disclosure, I import a line of SETs and am a dealer for KR and Emission Labs.