Tube help 6922

[Skaldir]

I'd like to change the tube in my Rode NTK mic and would like to know which one of these I should get.

http://www.tube-town.net/ttstore/index.php/cat/c310_ECC88---6922.html

What are the characteristics of those brands? Maybe someone has this knowledge.
I would like less high end than the stock tube, a bit rounder sound, but don't want to spend the money a Telefunken tube would cost for example.

 

[Skaldir]

Nobody?

EH, JJ, Sylvania, or Tesla that is the question